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    Archived pages: 1534 . Archive date: 2012-10.

  • Title: Quantum Diaries
    Descriptive info: .. Quantum Diaries.. Thoughts on work and life from particle physicists from around the world.. Home.. About Quantum Diaries.. Latest Posts.. All Blogs.. John.. Felde.. UC Davis.. USA.. View Blog.. Read Bio.. 2012.. 03.. 05 |.. Fast Photosensors for Neutrino Physics.. 2011.. 11.. 22 |.. Recent Events at UC Davis.. 09 |.. First Double Chooz Neutrino Oscillation Result.. USLHC.. 10.. Are the Higgs Rumors True?.. 16 |.. For the Higgs, No Theological Assistance Required.. 13 |.. Snowmass (Not Snowmass).. Frank.. Simon.. MPI for Physics.. Germany.. 07.. 04 |.. Plus Two.. 12.. 14 |.. After the talk is before the talk.. 24 |.. Breathe.. Flip.. Tanedo.. 19 |.. The Post-Higgs Hangover: where s the new physics?.. 06 |.. More Post-Higgs silliness.. Photoshop the Higgs.. CERN.. Geneva.. Switzerland.. Making particle physics mainstream.. The coolest and hottest fluid.. 09.. 28 |.. How is new physics discovered?.. Aidan.. Randle-Conde.. 08.. 15 |.. Understanding the Higgs search.. Spinning out of control!.. Higgs Seminar postgame discussion.. TRIUMF.. Vancouver, BC.. Canada.. I m Going to Tell You.. Does the General Public actually exist?.. Higgs Seminar Liveblog from TRIUMF #2.. Brian.. Dorney.. 20 |.. Higgs Dependence Day: The Nobel Perspective.. 01.. 10 |.. New State Discovered by the ATLAS Collaboration!.. 18 |.. An Update from OPERA!.. Jonathan.. Asaadi.. Syracuse University.. MicroBooNE Construction (The full post ).. 12 |.. Shameless Plugging.. 04.. Physics at work in the real world.. Richard.. Ruiz.. Univ.. of Pittsburgh.. U.. S.. A.. Read-Set-Go: The LHC 2012 Schedule.. Why The Higgs Boson Should Not Exist and Why This Is a Good Thing.. 03 |.. What Comes Next?.. Byron.. Jennings.. GRANTS AND THE SCIENTIFIC METHOD.. 07 |.. SCIENCE AND THE ARTS: COMPLEMENTARY PARADIGMS.. Science: Mankind’s Greatest Achievement!.. Fermilab.. Batavia, IL.. 11 |.. Springfield gets its own super collider.. Second muon experiment receives Mission Need approval from DOE.. Higgs in the media:.. Fermilab Today.. special online.. Seth.. Zenz.. VERTEX 2012.. Anna.. Phan.. 17 |.. So long, and thanks for all the fish.. 26 |.. Testing theory.. 02 |.. Measuring matter-antimatter asymmetries.. KEK.. Japan.. 27 |.. 全国各地の高校生、素粒子実験を体験 ‐Belle Plus2011開催‐.. 06.. J-PARC issued a press release on T2K experiment.. J-PARCからT2K実験に関するプレスリリースが発表されました.. Alexandre.. Fauré.. CEA/IRFU.. FRANCE.. The passion for Research.. Killed by a Deadline.. Pre-post for the HCP meeting of this week in Paris.. Brookhaven.. Long Island, NY.. Beyond the Higgs: Training PanDA to Tackle Astrophysics, Biology.. The Glue that Binds Us All.. Ghost Hunters: an international team tracks a disappearing particle.. Burton.. DeWilde.. Communicating Science and Its Value, pt.. 2.. 1.. Conference-going for the almost-graduated.. Jim.. Rohlf.. USA.. CERN July 4 Seminar.. 02.. Preparation for YETS another physics run.. The CERN Higgs seminar.. Emily.. Thompson.. 01 |.. Happy Birthday ATLAS!.. BOOST! Part 2: Jet Mass.. Biking to CERN.. Ken.. Bloom.. The LHC sneaks along, part 2.. The destiny of boson observation papers.. CNRS-IN2P3.. Paris.. France.. L’irruption des supraconducteurs à haute température critique.. 23 |.. Le LSM, le laboratoire bas-bruit qui fait du bruit dans les guides touristiques!.. Boson de Higgs : une « folle » journée !.. Hot Topics.. Pushing the Frontiers of Physics.. What will be the next big thing? Although no one can know for sure, researchers in the field are always exploring new possibilities.. Particle physicists in the US have just met up for a pre-planning meeting to prepare for the Snowmass workshop.. As.. blogger Ken Bloom explains.. , Snowmass is an opportunity for physicists to discuss which research questions the country s scientists should pursue, an important task given the planning and resources required to pursue the universe s big questions.. On a lighter note, for those who want to see physics at work within their own community, blogger Marcelle Soares-Santos has a more immediate solution.. You can.. build your own.. collider in a virtual Springfield (home to the Simpson s.. ).. By Ken Bloom | October 13, 2012.. Every so often, perhaps once or twice a decade, particle physics in the United States comes to some kind of a crossroads that requires us to think about the long-term direction of the field.. Perhaps there is new experimental data that is pointing in new directions, or technology developments that make some new facility possible, or we’re seeing the end of the previous long-term plan and it’s time to develop the next one.. And when this happens, the cry goes up in the community — “We need a Snowmass!”.. Read more.. Ken s blog.. By Fermilab | October 11, 2012.. Until last evening I thought that The Simpsons game for iPhone and iPad was just another overrated little game.. Your task is to rebuild Springfield after an explosion obliterates Homer’s power plant.. The game is supposed to be an interesting, easy-going distraction, but it evolves at too slow a pace (unless you are willing to spend money on it, which I am not) and lacks the much-appreciated humorous punch that characterizes the show.. Fermilab s blog.. By CERN | September 28, 2012.. Finding an experimental anomaly is a great way to open the door to a new theory.. It is such a good trick that many of us physicists are bending over backward trying to uncover the smallest deviation from what the current theory, the Standard Model of particle physics, predicts.. CERN s blog.. View previous posts.. Quand la physique des particules capture l attention du public.. Thursday, October 25th, 2012.. CERN (Francais).. La semaine dernière, j’ai participé à Mumbai, en tant que conférencier invité, à la réunion annuelle de l’association indienne ABCI (Association of Business Communicators of India), car on souhaitait savoir comment le CERN est parvenu à mettre la physique des particules sur le devant de la scène.. C’était la première fois que je me rendais en Inde, et cette visite restera longtemps gravée dans ma mémoire, pour de bonnes raisons uniquement.. Un des moments forts de la manifestation a été la cérémonie très « bollywoodienne » de remise des prix annuels de l ABCI, où je me suis vu décerner un magnifique trophée en cristal, récompensant la stratégie de communication du CERN.. J’étais évidemment honoré de recevoir cette récompense, qui trône maintenant fièrement sur mon bureau au CERN, mais, surtout, ce prix montre que le nom CERN est connu du monde entier depuis que nous avons pris la décision, en 2003, de faire connaître notre science au grand public et de tirer parti des possibilités exceptionnelles offertes par le LHC en termes de communication pour promouvoir la cause de la science.. J’ai toujours cru au potentiel du LHC comme un moyen pour la communauté des physiciens des particules de mettre la science à l’ordre du jour de la société civile, à une époque dominée par la science et la technologie, mais je n’aurais jamais imaginé que notre discipline allait autant se démocratiser.. On me disait : « tu sauras que tu as réussi quand tu commenceras à apparaître dans les dessins des journaux ».. Des dizaines de dessins nous ont fait rire depuis.. On m’a dit ensuite que, pour savoir si l’on a vraiment réussi, il faut que les Muppets parlent de nous.. Et les Muppets ont pensé à nous.. Notre Directeur général m’a même appelé de Berlin, à l’occasion du 20e anniversaire de la chute du mur, pour me dire que le CERN faisait là-bas la couverture des journaux.. Tout cela est bon pour la science, et pour la société, mais le plus important c est de voir à quel point les gens ont de plus en plus soif de science et, par ailleurs, de comprendre comment on parvient à des résultats scientifiques.. Les médias prennent le temps d’expliquer pourquoi nous avons besoin de cinq sigmas pour annoncer une découverte, et le public est de plus en plus nombreux à s’intéresser à nos séminaires scientifiques – près d’un demi-million de personnes ont suivi la réunion du 4 juillet durant laquelle le point a été fait sur la recherche du boson de Higgs.. Il y a toutefois encore beaucoup à faire.. Certes, il ne fait aucun doute que le nom CERN est aujourd’hui connu dans le monde entier.. On sait qui l’on est et on jouit d’une grande réputation, mais notre identité doit encore être renforcée.. Au sein de la communauté des physiciens des particules, tout le monde sait évidemment ce que nous faisons et pourquoi nous le faisons, mais, en dehors de ce cercle, les gens ont une idée assez vague de nos activités.. Pour reprendre les mots du Time magazine, à propos du séminaire du 4 juillet : « Dans un monde où tout va très vite, nous nous sommes arrêtés un instant pour contempler quelque chose qui nous dépasse.. » Le défi à relever maintenant, tant pour les scientifiques que pour les personnes qui communiquent pour eux, consiste à faire de cet instant un sujet de conversation quotidien.. La conférence de Mumbai, ComFest 12, a été un régal pour le professionnel de la communication que je suis ; j ai eu la chance de rencontrer des personnes représentant diverses entités, comme Coca Cola Inde ou plusieurs entreprises du groupe Tata.. Je suis honoré que la communauté scientifique dont je fais partie reconnaisse la valeur de toutes nos réalisations, mais ce qui compte le plus, c’est que la science soit au premier rang des préoccupations, pour apporter de l’aide aux gens dans leur vie quotidienne et permettre à la société de prendre les bonnes décisions sur les questions d’actualité politiques et scientifiques complexes.. Faisons en sorte qu’il en soit toujours ainsi.. Posted in.. |.. No Comments.. Wednesday, October 24th, 2012.. CERN.. Last week, I was in Mumbai as an invited speaker at the annual meeting of the.. Association of Business Communicators of India.. (ABCI), who wanted to find out what CERN had done to make particle physics mainstream.. It was my first visit to India, and one that will remain long in my memory for all the right reasons.. The event included the ABCI’s annual awards night, a Bollywoodesque affair from which I emerged with a handsome crystal trophy in recognition of CERN’s communications.. Honoured though I am to receive this, and it now takes pride of place on my desk at CERN, the real significance of the award is that it shows just how well known the CERN brand has become since we took the decision back in 2003 to do our science in public, and leverage the unique communications opportunity of the LHC to further the cause of science.. I have always been optimistic about the opportunity that the LHC gives particle physics to move science up the popular agenda, where it needs to be in a science and technology dominated age, but I never imagined just how mainstream our field would become.. Over the years, people have told me, “you’ll know you’ve made it when you start to see yourself in newspaper cartoons”.. Since then, we’ve laughed at dozens of them.. Then someone suggested that the real barometer of success was being featured by the Muppets.. We’ve been there too.. I even had a call from our Director General in Berlin on the 20.. th.. anniversary of the fall of the Berlin wall to tell me that CERN was on the cover of the newspapers there, on that of all days.. All this is good for science, and for society, but more significant is the way that people are developing a thirst for science and the way science is done.. Media channels are taking the time to explain why we need five-sigma to announce a discovery, and ordinary people are tuning into our scientific seminars – close to half a million of them on 4 July for the latest update in the quest for the Higgs particle.. We’ve still got a long way to go, however.. There’s no doubt that CERN has become established as a global brand.. We have brand recognition and a strong reputation, but our brand identity remains a work in progress.. Everyone in particle physics knows what we do and why it matters, but in the world at large when you really ask people what it is we do, they’re not really sure.. As Time magazine said of the 4 July seminar: “Despite our fleeting attention span, we stopped for a moment to contemplate something far, far bigger than ourselves”.. The challenge we still face, both scientists and those who communicate on their behalf, is to turn that fleeting moment into everyday conversation.. The Mumbai conference, ComFest 12, was a feast for a communications professional, giving me the chance to listen and learn from people representing organizations as diverse as several Tata companies and Coca Cola India.. I’m honoured that the industry I’ve made my home recognises all our achievements, but what really matters is that science is on the agenda, helping people with their everyday lives and equipping society to make the right decisions on the complex political/scientific issues of the day.. Let’s keep it that way.. James Gillies.. 1 Comment.. IceCube (and other) Winter-Overs at the South Pole.. Monday, October 22nd, 2012.. Michael DuVernois.. One of the questions that gets asked to most often is about the folks who run the IceCube experiment over the winter.. Who are these folks? What does it take to spend fourteen months at the South Pole? Six of those months in darkness with the sun set below the horizon.. So I ll try to answer some of these questions, mostly by linking to what the winterovers themselves say.. (And to their amazing aurora photos.. ).. Each year, the.. IceCube.. project.. advertises.. for the two IceCube winterover positions:.. Winter Over Positions.. Winter-overs deploy to Antarctica continuously for 14 months, mid-October to mid-November.. Individuals participate in a wide range of activities and must pass physical and psychological evaluations of their ability to live and work in remote and high altitude locations.. Degree requirements: M.. in Electrical Engineering, Computer Science, Physics, or a related field; B.. with substantial related field experience (equivalent to a Master s Degree) will be considered.. Sometimes the person is already a collaborator, or affiliated with IceCube, perhaps a recently-completed graduate student, but most often the person is from a different science field.. The winterover is responsible for keeping the detector running through the winter with some help/supervision from the Northern Hemisphere, but mostly independently.. The laboratory is about two kilometers away from the South Pole Elevated Station, so it s a good cold walk out to the experiment.. But the views are.. astonishing.. !.. And you can see some of Sven s.. aurora shots here.. Sven and Carlos are this past year s winterovers for IceCube, their reports can be seen at the.. IceCube website news listings.. There s a good.. What is a Winterover.. there as well.. At Pole there are two seasons, Summer and Winter.. In the Summer, there is sunshine and a population of at least a 150 people at the station.. The weather is relatively warm, from -40C (= -40F) up to an all-time record high temperature of +10F last Christmas.. This is when the work is done building new experiments, when most of the scientists and engineers who work down there visit for a few weeks, or six weeks, or eight weeks.. During IceCube construction, the drill teams would core down a mile in the ice for each of IceCube s 86 strings during the Summer.. The Winter is defined by the departure of the last aircrafts (jet fuel starts to gel as it gets too cold), the setting of the sun, and truly cold (-70C, -100F) temperatures.. In the Winter, the South Pole Station is down to about fifty hardy souls.. I recently found this interesting.. Winterover Statistics.. page that gives some insight into the folks who have wintered for a record number of South Pole winters (five in a row! nine total times!).. Not for me! Though had I known about it, perhaps back when I was twenty and single.. Seth Zenz.. What Higgs rumors, you may ask? Well, there aren t any that I know of, yet.. But there might be soon.. There might be rumors soon because we are about to do another round of updates, for the.. 2012 Hadron Collider Physics Symposium.. (HCP).. There aren t any yet because our results (at least on CMS) are still blinded, which means that we haven t actually looked at the places in the data where we see signs of our new boson.. What we re doing instead is looking at simulated data to see how much our results might improve when we add in the collisions we ve recorded since ICHEP.. We re also putting in a few new analysis techniques, and checking them in the same way.. And of course we.. are.. looking at data in other places, and we re comparing it to simulations to make sure they re doing a good job.. There will be several weeks between the moment we unblind that is, look for the first  ...   the place.. ALICE.. experiment is dedicated to the study of the quark-gluon plasma.. Each year, the LHC operates for a few weeks with lead ions instead of protons.. ALICE collects data both during proton-proton collisions and heavy ions collisions.. Even when only protons collide, the projectiles are not solid balls like on a billiard table but composite objects.. By comparing what can is obtained from heavy ion collisions with proton collisions, the ALICE physicists must first disentangle what comes from having protons in a bound state inside the nucleus as opposed to “free protons”.. So far, it appears that the quark-gluon plasma only formed during heavy-ion collisions since they provide the necessary energy density over a substantial volume (namely, the size of a nucleus).. Some of the effects observed, such as the number of particles coming out of the collisions at different angles or momenta, depend in part on the final state created.. When the plasma is formed, it reabsorbs many of the particles created, such that fewer particles emerged from the collision.. By colliding protons and heavy ions, scientists hope to discern what comes from the initial state of the projectile (bound or free protons) and what is caused by the final state (like the suppression of particles emitted when a quark-gluon plasma forms).. Already, with only one day of data taken in this new mode, the ALICE collaboration just released two papers.. The first one presents the measurements of the charged hadrons density produced in proton-ion collisions and compares the result with the same measurement after proper normalization performed in proton-proton and ion-ion collisions.. The second compares the transverse momentum distributions of charged hadrons measured in proton-ions and proton-proton collisions.. The ultimate goal is to study the so-called “structure function”, which describes how quarks and gluons are distributed inside protons, when they are free or embedded inside the nucleus.. More will be studied during the two-month running period with protons colliding on heavy ions planned for the beginning of 2013.. A “snapshot” of the debris coming out of a proton-lead ion collision captured by the ALICE detector showing a large number of various particles created from the energy released by the collision.. Pauline Gagnon.. To be alerted of new postings, follow me on Twitter: @GagnonPauline.. or sign-up on this.. mailing list.. to receive and e-mail notification.. LHC.. proton-ion collision.. quark-gluon plasma.. Torride et cool à la fois.. En septembre, les opérateurs du.. Grand Collisionneur de Hadrons.. (LHC) au.. on réussi un truc nouveau : mettre en collision un faisceau de protons avec un faisceau d’ions de plomb.. Habituellement, le LHC fonctionne avec deux faisceaux de particules identiques (protons ou ions) circulant en sens inverse dans l’accélérateur.. Pourquoi cette nouvelle configuration ?.. Ces ions sont des atomes auxquels on a arraché tous les électrons, ne laissant que le noyau atomique.. Les ions de plomb contiennent 82 protons plus 126 neutrons, le tout maintenu ensemble par la force nucléaire.. Les protons sont eux aussi des particules composites puisqu’ils sont faits de trois quarks « collés » ensemble grâce aux «.. », les particules associées à la force nucléaire.. Alors quand de tels noyaux entrent en collision à presque la vitesse de la lumière, qui pourrait prédire où chaque.. et chaque gluon aboutira? Même avec seulement quinze balles de billard, il est pratiquement impossible de deviner où elles iront après la casse.. Si, de surcroit, chaque projectile est fait de centaines de particules, cela devient totalement imprévisible.. A première vue, il semblerait que tout ce qui peut sortir de collisions ions-ions est un fouillis incroyable.. Mais en fait, ces collisions super énergétiques produisent le fouillis le plus torride et le plus cool qui soit : un plasma de quarks et gluons.. Tout le monde connaît les trois états de la matière: solide, liquide et gazeux mais le quatrième état, le plasma, est lui bien moins connu.. C’est ce qu’on retrouve dans un tube au néon quand la différence de potentiel appliquée est assez forte pour arracher tous les électrons du gaz.. Les ions chargés positivement ainsi que les électrons flottent librement, ayant suffisamment d’énergie pour ne pas se recombiner.. Le plasma de quarks et gluons est juste l’étape suivante.. Imaginez qu’on fournisse suffisamment d’énergie pour pouvoir dissocier non seulement les atomes mais aussi les noyaux et mêmes les nucléons (le nom générique donné aux neutrons et protons à l’intérieur des noyaux atomiques).. On obtient alors une soupe extrêmement énergétique de quarks et de gluons.. Il n’y a pas plus chaud et ce serait l’état dans lequel se trouvait toute la matière immédiatement après le Big Bang.. Fait étonnant : le plasma de quarks et gluons se comporte comme un fluide ayant des propriétés collectives et non comme un ensemble de particules indépendantes.. C’est en fait un fluide parfait ayant une viscosité nulle.. Si on essayait de le confiner dans un contenant, le fluide remonterait les parois du contenant et se répandrait au maximum.. Plus cool que ça et tu meurs….. L’expérience.. se consacre justement à l’étude de ce plasma.. Chaque année, le LHC opère pour quelques semaines avec des ions de plomb au lieu des protons.. ALICE accumule des données durant les collisions protons-protons et celles d’ions lourds.. Même lorsque ce sont seulement des protons qui entrent en collision, les projectiles ne sont pas des balles pleines comme au billard mais bien des objets composites.. En comparant ce que l’on obtient à partir de collisions d’ions ou de protons, les physicien-ne-s d’ALICE doivent d’abord distinguer ce qui vient du fait que les projectiles sont des protons liés dans le noyau ou bien à l’état libre.. Jusqu’à maintenant, il semble que le plasma de quarks et gluons ne se forme que dans les collisions d’ions puisqu’ils sont les seuls à fournir la densité d’énergie requise sur un volume assez substantiel (le volume d’un noyau atomique).. Certains des effets observés, comme le nombre de particules à émerger du plasma de quarks et gluons à différents angles ou vitesses dépend en partie de la nature de l’état final créé.. Quand un plasma se forme, il réabsorbe une partie des particules émises, de telles sortent qu’on en voit beaucoup moins sortir de ces collisions.. Les collisions de protons sur des ions lourds permettront peut-être de démêler ce qui est attribuable à l’état initial (protons libres ou liés dans le noyau) et l’état final (comme lorsque le plasma réabsorbe une partie des particules émises).. Déjà, avec une seule journée d’opération à ce régime, la collaboration ALICE vient de publier deux articles scientifiques.. Le premier article donne la mesure de la densité de hadrons chargés produits dans des collisions proton-ions comparée aux mêmes mesures effectuées avec des collisions protons-protons ou ions-ions, après avoir normalisé le tout.. Le second article porte sur la comparaison des distributions de quantités de mouvement des hadrons chargés pour des collisions protons-protons et ions-ions.. Le but ultime est d’étudier les fonctions de structure des projectiles utilisés, c’est-à-dire décrire comment les quarks et les gluons sont distribués à l’intérieur des protons quand ils sont libres ou liés dans le noyau des ions de plomb.. Bien d’autres études suivront au début de 2013 durant la période de deux mois consacrée aux collisions protons-ions.. « Cliché » des débris d’une collision de proton-ion de plomb capturé par le détecteur ALICE montrant un grand nombres de particules diverses crées à partir de l’énergie dégagée.. Pour être averti-e lors de la parution de nouveaux blogs, suivez-moi sur Twitter: @GagnonPauline ou par e-mail en ajoutant votre nom à cette.. liste de distribution.. proton-ion collisions.. Tuesday, October 16th, 2012.. I like talking about science.. I like talking about religion.. I even like talking about the relationship and boundaries between the two.. These are all fascinating subjects, with many questions that are very much up for debate, so I am very pleased to see that CERN is participating in.. an event in which scientists, philosophers, and theologians talk together about the Big Bang and other questions.. But this quote, at least as reported by the BBC, simply doesn t make any sense:.. Co-organiser Canon Dr Gary Wilton, the Archbishop of Canterbury s representative in Brussels, said that the Higgs particle raised lots of questions [about the origins of the Universe] that scientists alone can t answer.. They need to explore them with theologians and philosophers, he added.. The Higgs particle does no such thing; it is one aspect of a model that describes the matter we see around us.. If there is a God, CERN s recent observations tell us that God created a universe in which the symmetry between the photon and the weak bosons is probably broken via the Higgs Mechanism.. If there is not, they tell us that a universe exists anyway in which the symmetry between the photon and the weak bosons is probably broken via the Higgs Mechanism.. It doesn t raise any special questions about the origins of the universe, any more than the existence of the electron does.. There are many interesting philosophical questions to ask about the relationships between models of scientific observations on the one hand, and notions of absolute Truth on the other.. You can also talk about what happened before the times we can make scientific observations about, whether there are other universes with different particles and symmetries, and so on.. Theologians and philosophers have much to say about these issues.. But in regard to searches for the Higgs boson in particular, the people we need to explore questions with are mostly theoretical physicists and statisticians.. Philosophy of science.. religion.. science and religion.. 10 Comments.. Saturday, October 13th, 2012.. Ken Bloom.. Perhaps there is new experimental data that is pointing in new directions, or technology developments that make some new facility possible, or we re seeing the end of the previous long-term plan and it s time to develop the next one.. And when this happens, the cry goes up in the community We need a Snowmass!.. Snowmass.. refers to Snowmass Village in Colorado, just down the road from Aspen, the home of the.. Aspen Center for Physics.. , a noted haunt for theorists.. During the winter, Snowmass a ski resort.. During the summer, it s a mostly empty ski resort, where it s not all that expensive to rent some condos and meeting rooms for a few weeks.. Over the past few decades there have been occasional summer studies held at Snowmass, typically organized by the.. Division of Particles and Fields.. of the.. American Physical Society.. (and sponsored by a host of organizations and agencies).. It s a time for the particle-physics community to come together for a few weeks and spend some quality time focusing on long-range planning.. The last big Snowmass workshop was in.. 2001.. At the time, the Fermilab Tevatron was just getting started on a new data run after a five-year shutdown for upgrades, and the LHC was under construction.. The top quark had been discovered, but was not yet well characterized.. We were just beginning to understand neutrino masses and mixing.. The modern era of observational cosmology was just beginning.. A thousand physicists came to Snowmass over the course of three weeks to plot the future of the field.. (And I was.. a lot younger.. ) Flash forward eleven years: the Tevatron has been shut down (leaving the US without a major high-energy particle collider), the LHC is running like gangbusters, we re trying to figure out what dark energy is, and just in the past year two big shoes have dropped we have measured the last neutrino mixing angle, and, quite famously, observed what could well be the Higgs boson.. So indeed, it is time for another Snowmass workshop.. This week I came to Fermilab for a.. Community Planning Meeting.. for next year s Snowmass workshop.. Snowmass 2013.. is going to be a bit different than previous workshops in that it will not actually be at Snowmass! Budgetary concerns and new federal government travel regulations have made the old style of workshop infeasible.. Instead, there will be a shorter meeting this summer hosted by our colleagues at the University of Minnesota (hats off to thee for having us), so this time we won t have as much time during the workshop to chew over the issues, and more work will have to be done ahead of time.. (But I suspect that we re still going to call this workshop Snowmass , just as the ICHEP conference was.. the Rochester conference.. for such a long time, even if it s now the Community Summer Study.. This Snowmass is being organized along the three.. frontiers.. that we re using to classify the current research efforts in the field energy, intensity and cosmic.. As someone who works at the LHC, I m most familiar with what s going on at the energy frontier, and certainly there are important questions that have only come into focus this year.. Did we observe the Higgs boson at the LHC? What more do we have to know about it to believe that it s the Higgs? What are the implications of not having observed any other new particles yet for particle physics and for future experiments? The Snowmass study will help us understand how we answer these questions, and specifically what experiments and facilities are needed to do so.. There are lots of interesting ideas that are out there right now.. Can the LHC tell us what we need to know, possibly with an energy or luminosity upgrade? Is this the time to build a Higgs factory that would allow us to study measure Higgs properties precisely? If so, what s the right machine for that? Or do we perhaps need an accelerator with even greater energy reach, something that will help us create new particles that would be out of reach of the LHC? What kind of instrumentation and computing technologies are needed to make sense of the particle interactions at these new facilities? The intensity and cosmic frontiers have equally big and interesting questions.. I would posit that the scientific questions of particle physics have not been so compelling for a long time, and that it is a pivotal time to think about what new experiments are needed.. However, we also have the bracing reality that we are looking at these questions in a budget environment that is perhaps as constrained as it has ever been.. Presentations from our.. champions.. and.. advocates.. at the Department of Energy and the National Science Foundation, the agencies that fund this research (and that sponsor the US LHC blog) were encouraging about the scientific opportunities but also noted the boundary conditions that arise from the federal budget as a whole, national research priorities, and our pre-existing facilities plan.. It will continue to be a challenge to make the case for our work (compelling as it may be to us, and to someone who might be interested in looking at the Quantum Diaries site) and to envision a set of facilities that can be built and used given the funding available.. The first (non-native) settlers of Snowmass, Colorado, were miners, who were searching for buried treasure under adverse conditions.. They were constrained by the technology of the time, and the facilities that were available for their work.. I shouldn t suggest that what we are doing is exactly like mining (it s much safer, for one thing), but hopefully when we go to Snowmass (or really Snowmass ) we will be figuring out how to develop the technology and facilities that are needed to extract an even greater treasure.. 4 Comments.. Search:.. Search for:.. Blogs.. People.. Select personal blog.. Aidan Randle-Conde (53).. Alexandre Fauré (8).. Alexey Petrov (8).. Andrew Adare (3).. Anna Phan (39).. Brian Dorney (20).. 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  • Title: Quantum Diaries
    Descriptive info: Quantum Diaries is a Web site that follows physicists from around the world as they experience life at the energy, intensity and cosmic frontiers of particle physics.. Through their bios, videos, photos and blogs, the diarists offer a personal look at the daily lives of particle physicists.. The original Quantum Diaries launched in 2005 to celebrate the World Year of Physics.. Today Quantum Diaries returns with a new set of diarists who represent a vibrant cross-section of working physicists.. This project is not just about physics; it’s about being a physicist.. The diarists will write about their families, hobbies and interests, as well as their latest research findings and challenges that face them in their  ...   mission is to support the science of particle physics and set visible footprints for peaceful collaboration across all borders.. Quantum Diaries Blogger Alumni.. CERN bloggers.. Name.. Blog.. Bio.. Gavin Hesketh.. Author s Blog.. Author s Bio.. Paul Jackson.. Phil Richerme.. DESY bloggers.. Ingrid Gregor.. Tony Hartin.. Drexel University bloggers.. Jelena Maricic.. Fermilab bloggers.. Robert Kutschke.. Ron Moore.. Bjoern Penning.. Dave Schmitz.. CNRS/IPHC bloggers.. Florian Miconi.. IHEP bloggers.. Cao Jun.. KEK bloggers.. Junpei Fujimoto.. NIKHEF bloggers.. Lucie de Nooij.. IceCube bloggers.. Marcos Santander.. Ohio State University bloggers.. Homer Wolfe.. SLAC bloggers.. Nicole Ackerman.. TRIUMF bloggers.. Anadi Canepa.. Chris Ruiz.. University of Tokyo bloggers.. Masahiro Oroku.. US LHC bloggers.. Andrew Adare.. Robin Erbacher.. Katherine Copic.. Michael Schmitt..

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  • Title: Quantum Diaries
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  • Title: Quantum Diaries
    Descriptive info: Adam Yurkewicz.. (60).. Aidan Randle-Conde.. (53).. Alexandre Fauré.. (8).. Alexey Petrov.. (16).. Andres Florez.. (7).. (3).. Anna Phan.. (39).. Brian Dorney.. (20).. (24).. Burton DeWilde.. (19).. Byron Jennings.. (57).. (27).. (67).. (63).. (12).. Christine Nattrass.. (36).. (10).. Corrinne Mills.. (4).. David Schmitz.. (15).. Denis Oliveira Damazio.. Edgar Carrera.. (22).. Emily Thompson.. (5).. (110).. Flip Tanedo.. (97).. (6).. Frank Simon.. (92).. Freya Blekman.. (13).. Greg Landsberg..  ...   Asaadi.. (44).. (14).. (9).. (112).. Kevin Black.. Koji Hashimoto.. Liangjian Wen.. (23).. (21).. Matthew Tamsett.. Mike Anderson.. (51).. Monica Dunford.. (50).. (49).. Pam Klabbers.. Peter Steinberg.. (47).. Rama Calaga.. Regina Caputo.. (48).. Rene Bellwied.. (11).. Rice University.. Richard Ruiz.. (29).. Rosi Reed.. Sarah Demers.. (108).. Steve Nahn.. Vivian O Dell.. Susanne Reffert.. Ted Kolberg.. (61).. Vivek Jain.. Zachary Marshall.. (17).. Zeynep Isvan.. Zoe Louise Matthews.. (71)..

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  • Title: Quantum Diaries
    Descriptive info: John Felde | UC Davis | USA.. Older Entries.. Monday, March 5th, 2012.. Last week we hosted Matthew Wetstein from Argonne National Lab for a High Energy Physics Seminar.. Matthew has been working on a project of great interest to me: the development of fast, large area photo sensors.. For a little background, a lot of neutrino (and indeed other) detectors, rely on detecting photons (light) that are produced from energetic particles.. Currently, the most economical devices are.. photomultiplier tubes.. (PMTs).. There are some practical limitations to these devices, including size, performance in a magnetic field, and timing.. Large-Area Picosecond Timing Project.. , a group primarily from The University of Chicago, Argonne, Fermilab and Berkeley, are working to develop large (~8in^2), flat, fast, and cheap particle detectors for use in physics, medical, and industry applications.. The photosensors are designed as Micro-Channel Plates (.. MCP.. ), but fabricated in a different, cheaper, way.. The timing resolution (how well you can tell when your signal came) is currently around 100 pico-seconds, or about 10 times better than typical large area PMTs.. Detectors such as.. these.. (above) could have real potential in neutrino physics.. Many neutrino detectors function by detecting either direct.. Cherenkov light.. , and/or.. scintillation light.. produced in the detection medium.. Our goal is always to maximize the detection of this light by having as many sensors as possible, hence we like things cheap.. Knowing exactly when the light reaches the sensitive part of our detector is how we determine where in the detector the interaction took place, hence we like things fast.. Knowing exactly where on the wall of our detector the light hit helps constrain the geometry and type of event, hence we like lots of pixels.. As an example, one area where these sensors might be useful is in large water Cherenkov detectors.. A primary background for these detectors is distinguishing electrons from neutral pion decays.. An electron appears as a single fuzzy ring on the wall of the detector.. A neutral pion will decay and appear as two separate electron like rings.. A major background come about because sometimes your detector simply can not tell distinguish two rings from one.. With highly pixelated and fast photosensors, one could better distinguish these two types of events by either both being more sensitive to seeing two rings, or separating the rings in time.. A great deal of work has been done by this group to understand the potential impact of these devices on the field, and we never get tired of thinking how we could get the most out of our detectors.. EDIT: For more info see.. 1 Comment.. Tuesday, November 22nd, 2011.. By now, I would imagine anyone tech savvy enough to be following this blog site has been exposed to the chilling stories, images, and videos of the events which took place last week at my university.. Not surprisingly, the actions of the university police, called for by the administration, have greatly enraged the students, alumni, staff, faculty, and friends of UC Davis.. A rally was held yesterday on the main quad to demonstrate, in overwhelming numbers, the disgust and shame felt by our community in light of these events.. In response to these events the undersigned faculty of the UC Davis Physics department have prepared a statement (.. original here.. ):.. Chancellor Linda Katehi November 22, 2011.. Dear Chancellor Katehi:.. With a heavy heart and substantial deliberation, we the undersigned faculty of.. the UC Davis physics department send you this letter expressing our lack of.. confidence in your leadership and calling for your prompt resignation in the wake.. of the outrageous, unnecessary, and brutal pepper spraying episode on campus.. Friday, Nov.. 18.. The reasons for this are as follows.. • The demonstrations were nonviolent, and the student encampments.. posed no threat to the university community.. The outcomes of sending in.. police in Oakland, Berkeley, New York City, Portland, and Seattle should.. have led you to exhaust all other options before resorting to police action.. • Authorizing force after a single day of encampments constitutes a gross.. violation of the UC Davis principles of community, especially the.. commitment to civility: “We affirm the right of freedom of expression within.. our community and affirm our commitment to the highest standards of.. civility and decency towards all.. • Your response in the aftermath of these incidents has failed to restore.. trust in your leadership in the university community.. We have appreciated your leadership during these difficult times on working to.. maintain and enhance excellence at UC Davis.. However, this incident and the.. inadequacy of your response to it has already irreparably damaged the image of.. UC Davis and caused the faculty, students, parents, and alumni of UC Davis to.. lose confidence in your leadership.. At this point we feel that the best thing that.. you can do for this university is to take full responsibility and resign immediately.. Our campus community deserves a fresh start.. Sincerely,.. Andreas Albrecht Glen Erickson Lori Lubin.. (chair) Chris Fassnacht Markus Luty.. Marusa Bradac Daniel Ferenc Michael Mulhearn.. Steve Carlip Ching Fong David Pellett.. Hsin-Chia Cheng Giulia Galli Wendell Potter.. Maxwell Chertok Nemanja Kaloper Sergey Savrasov.. John Conway Joe Kiskis Richard Scalettar.. Daniel Cox Lloyd Knox Robert Svoboda.. James P.. Crutchfield Dick Lander John Terning.. Mani Tripathi.. David Webb.. David Wittman.. Dong Yu.. Gergely Zimanyi.. Myself, along with many graduate and undergraduate students, stand with our faculty, and appreciate their strong voice on our behalf.. 2 Comments.. Wednesday, November 9th, 2011.. Today the.. Double Chooz.. collaboration presented our first results with about 100 days of single detector data at the LowNu11 conference at Seoul National University, South Korea.. presentation.. was given by our spokesperson, Herve de Kerret, and was such an exciting moment for our entire collaboration.. A.. press release.. was submitted to interactions.. org.. Spokesperson, Herve de Kerret, presenting First results from the Double Chooz experiment.. In case a refresher is necessary, our experiment searches for the last unmeasured mixing angle, θ.. 13.. , in the three-neutrino mixing matrix, via the disappearance of.. ν.. e.. produced by the dual 4.. 27 GWth Chooz B reactors.. This simply means that if the neutrinos are in fact oscillating, we should measure fewer neutrinos at our detector than what we would have expected the reactors to produce.. The formula for this is given by:.. where we see that sin.. 2θ.. sets the amplitude of the oscillation.. As I stated before, our initial analysis was performed on about 100 days of far detector only data.. This graph shows both the data taking efficiency broken up into sub categories, and the total data taking time.. During the August to September period, myself and others were on site to conduct the first radioactive source calibrations of the detector.. The special data acquired during this time helped understand the detector response and was used to determine certain errors on our measurement.. By combing though the data we can identify neutrino interactions by their unique signature.. The detection reaction is called inverse beta decay, and results in the neutrino creating a positron (the anti-particle of the electron) and a neutron.. The detector can measure the positron s energy, and the energy released when the neutron captures on a Gadolinium nucleus inside the liquid scintillator.. The double signal is beneficial for reducing random backgrounds since the mean time between the events is about 30 micro seconds..  ...   data!) to fully understand nature, so here is wishing all experiments good data!.. Au revoir.. Where in the world?.. Thursday, April 14th, 2011.. In a little more that a week I will be traveling to France to perform some work on the Double Chooz far detector.. When I tell my friends, family, and even colleagues, more often than not they assume I am going to CERN.. It s not suprising seeing as how CERN is arguably the central hub for particle physics in Europe, and is at least partly in France.. Double Chooz, however, is not located at CERN.. It is located at a nuclear power plant near the town of Chooz (pronounced like show, not choose ) near the French Belgian border.. I will be spending 3 months on site for this first trip, and likely be back later in the year for another stay.. This will be my first extended stay in Europe, and first time to Belgium and France.. Our collaboration is lucky to have housing near the reactor in the form of a Chateau.. It is really nice to have have to deal with finding housing!.. This is an exciting time for me, but there is still a lot of work that needs to get done before I leave.. I look forward to sharing my stories of this new experience.. News from Double Chooz.. Friday, February 25th, 2011.. There was a nice article about the Double Chooz experiment in.. Symmetry Breaking.. recently.. It was also featured in today s.. news letter.. Since I don t think I have posted an explanation of the experiment I thought I would just share this link to the.. article.. Last week the Double Chooz collaboration met in Heidelberg, Germany at the Max-Plank-Institute for Nuclear Physics.. This was a very exciting meeting because the first detector has been up and running for a few months now, and people have had a chance to look at the data.. This was my first meeting in Europe, and my first time ever in Germany.. The flight from California was arduousness, 11 hours, but we did fly non-stop which at least allowed for the possibility of sleep.. I dozed in and out a little, and then had to give a talk to the collaboration exactly 24 hours after I woke up that day! It was a long day, but to my surprise I had plenty of energy to give a good talk.. The coffee helped too!.. Unfortunately, our trip did not allow for any sightseeing.. There is a really neat castle in Heidelberg that we saw while walking to dinner, I would have liked to take a look inside.. We did have a nice dinner at an old German beer house.. Long wooden tables, family style meal, and large beer steins, what more could you ask for?.. Although our detector is pumping out it s first data, installation is not entirely complete.. UC Davis is responsible for the fabrication and installation of a glove box (yep, a big box that you stick your hands into) which will allow us to deploy radioactive sources into our detector for calibration.. Basically, we need to introduce a known signal and compare it with what our detector sees.. This allows us to better understand how well we can reconstruct the position and energy of neutrino interactions inside our detector.. Late next month I will go to Chooz to install the glove box and stay for a few months to deploy the sources.. Perhaps my next post will be from France.. Au Revoir.. Budgets, DUSEL, and LBNE.. Wednesday, February 23rd, 2011.. I know it has been a week or two since this was breaking news, but I wanted to discuss the recent budget cuts and how they could impact my life as a young scientist.. The Presidents FY12 budget called for the termination of NSF funding of DUSEL, the proposed Deep Underground Science and Engineering Laboratory, in the Homestake mine in South Dakota, see below.. The purpose of DUSEL was to provide an underground laboratory for scientific experiments, and is most needed for particle physics experiments including neutrino oscillations, supernova neutrinos, direct dark matter searches, neutrinoless double beta decay searches, and other experiments which require a low cosmic ray background.. The decision to terminate NSF funding for DUSEL was a bit of a shock; however, just a few weeks earlier an internal NSF committee decided to not award supplemental funds to the DUSEL design team.. Perhaps a sign of things to come.. It is worth remembering that this is the administrations take on the budget situation, and congress might have a different opinion.. Either way, we are not off to a good start.. Although DUSEL has taken a big hit, the Long Baseline Neutrino Experiment (LBNE) remains a high priority for the Department of Energy independent of DUSEL.. This is comforting to hear for someone with an interest in LBNE and neutrino oscillation physics, but without DUSEL a lot of other interesting science is likely to go unstudied.. In the US at least.. Heres keeping our fingers crossed, and please see other posts for instructions to contact your congress person to show your support.. Free Public Lecture.. Thursday, February 3rd, 2011.. Last night the Physics department hosted Nima Arkani-Hamed, a theoretical physicist at the Institute for Advanced Study.. He gave a free public lecture, entitled Space-Time, Quantum Mechanics, and the Large Hadron Collider, to roughly 500 people.. Oddly enough, the lecture was held in a large room connected to the Activities and Recreation Center which serves as the campus gym.. Nice to see it being used for intellectual exercise as well as physical.. http://justinide.. com/#/university-photography/harvard-university/harvard_d.. One particular comment he made struck a chord with me and my colleague.. While explaining the four fundamental forces of nature, he mentioned very briefly the Weak Nuclear force, and had a cartoon of the beta decay of a neutron.. During the explanation he directed his pointer to the little neutrino emitted in this reaction and said this to the audience: This thing here is a neutrino, you don t really need to care too much about it.. I certainly don t.. Most of the audience laughed, I gave a rather sad look to the only other neutrino physicist in the audience.. Now, before we take any offense, he did also explain that he doesn t really care about ANY of the particles, and is much more interested in the laws that govern them.. This should should be the attitude of any physicist, but there is no shame in having a favorite particle right?.. All things considered, the lecture was a great success.. Teaching the general public to the ideas of Quantum Mechanics and General relativity is a daunting task, and I am certainly glad it was not me up on the podium.. The end of his ~2 hour lecture focused on the experiments at the LHC, and what we might hope to discover with them.. Unfortunately for Nima, the audience had many more questions about the inner workings of the LHC than they did the implications of a quantized space-time.. This led to many questions being answered by the experimentalists in attendance rather than Nima.. I can assure you that whatever level of interest he might have in ordinary particles, like neutrinos, would dwarf his level of interest in how they achieve vacuum in the LHC beam line..

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  • Title: Quantum Diaries
    Descriptive info: I am a graduate student in the High Energy Physics group at the University of California, Davis.. Although a large fraction of our faculty and students work on the collider experiments at Fermilab and the Large Hadron Collider at CERN, there is a small contingent of us who work on experimental neutrino physics.. Our group works on the Double Chooz reactor neutrino experiment, and the proposed Long-Baseline Neutrino Experiment, LBNE.. The goal of the Double Chooz experiment is to measure the last unknown neutrino mixing angle, theta_13, the value of which is of profound importance to LBNE.. I came to UC Davis as an undergraduate student in 2002 and have been associated with the Physics department in some way ever since.. I graduated with a degree in physics in 2006 and accepted a staff position with the department's teaching labs, where I got to build and maintain the experiments used in the undergraduate labs.. The next year I was accepted into the graduate program to pursue a Ph.. D.. When people ask me why I study neutrinos I never really have a good answer, much like I don't know why my favorite color is blue.. I first got interested in particle physics in the late 90's and I remember hearing a lot of  ...   large Water Cherenkov detector option, which is much like the Super Kamiokande detector in Japan.. My focus is on the low-energy physics that can be done with such a detector, and in particular, the prospects for detecting the diffuse background of about 10 MeV neutrinos from all Type-II Supernovae throughout the history of the universe.. So far my experiences in LBNE have been unique.. I was the first graduate student to work on this experiment, a neat accolade if the experiment continues, and was the only graduate student for the first six months or so.. It is fun to be involved with an experiment at such an early stage.. The studies I do have a real impact on the design of the experiment.. I also enjoy meeting and chatting with the professors who all tell great stories of working on previous experiments.. When I am not thinking about neutrinos, I enjoy playing sports, walking my dog, Oliver, and watching movies.. Students in the physics department do a great job of organizing sport teams.. I play on the soccer, basketball, and softball teams.. Our cleverly chosen softball team name is “The Bad News Bosons.. ” However, it is more difficult than one might expect to explain what a boson is to the other team..

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  • Title: Quantum Diaries
    Descriptive info: LHCb trouve une poignée d’évènements très spéciaux parmi dix milliards!.. Frequently Asked Questions About the Higgs Boson.. John Felde | UC Davis | USA.. This entry was posted on Monday, March 5th, 2012 at 4:38 pm and is filed under.. You can follow any responses to this entry  ...   or.. trackback.. from your own site.. One Response to Fast Photosensors for Neutrino Physics.. SHIKHAR SARASWAT.. says:.. July 7, 2012 at 1:29 am.. GOOD JOB.. HOPING FOR GREAT SUCCESS.. Reply.. Leave a Reply.. Commenting Policy.. Click here to cancel reply.. Name (required).. Mail (will not be published) (required).. Website..

    Original link path: /2012/03/05/fast-photosensors-for-neutrino-physics/
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  • Title: Quantum Diaries
    Descriptive info: Why do we expect a Higgs boson? Part I: Electroweak Symmetry Breaking.. Dr Matthews says, Jusk ask!.. This entry was posted on Tuesday, November 22nd, 2011 at 6:53 pm and is filed under.. 2 Responses to Recent Events at UC Davis.. Xezlec.. November 22, 2011 at 9:56 pm.. Why not fire the unapologetic and directly-responsible cop instead of the apologetic and indirectly-responsible administrator? Also, isn t it possible that this is getting a little overblown? A cop got carried away and abused his power a bit when his way was blocked by somebody.. A whole nation of hundreds of millions of people is now all up in arms over some temporary pain for a handful of ballsy kids that is all gone by now anyway.. I could understand if it made the local news, but aren t there bigger issues for the entire United States of America to worry about?.. And I apologize if this sentiment causes any offense  ...   the 1960s when I was a university student I was very much involved in student protest to the point of occupation of one of the campus buildings at University of Toronto.. Through it all our university faculty and administration acted with considerable patience.. Eventually they invited us to participate in a dialog about the issues that were the focus of our rage.. The Vietnam War, poverty, the Cold War, and local educational issues were the drivers for numerous nonviolent protests.. But at no time did we witness police doing what the videos and still pictures display.. It is frightening to see in a democratic society such a display of zealous abuse of power.. I understand why your department has condemned both the action and the response of your university leadership.. Thank you for letting others know about your response to what can only be described as a stupid act of overbearing behaviour by a person wielding authority without a brain..

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  • Title: Quantum Diaries
    Descriptive info: Leadership from the Front or Back of the Room?.. HCP2011 ou des plaisirs d’organiser une conférence en physique des particules.. This entry was posted on Wednesday, November 9th, 2011 at 9:13 pm and is filed under.. 3 Responses to First Double Chooz Neutrino Oscillation Result.. Stanley.. November 9, 2011 at 9:37 pm.. Way to go Double  ...   analysis?.. Congrats again for this result!.. jfelde.. November 10, 2011 at 1:32 am.. Thanks!.. Yes, the detailed reactor information was kept secret from all but a few during the candidate selection and analysis.. This information was released only once our final cuts had been determined and set.. Kea.. November 9, 2011 at 11:35 pm.. Fantastic! Congratulations!..

    Original link path: /2011/11/09/first-double-chooz-neutrino-oscillation-result/
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  • Title: Quantum Diaries
    Descriptive info: On Quantum Diaries.. US LHC's Blog.. Links.. National Science Foundation.. US Department of Energy.. The Large Hadron Collider is the world's most powerful particle.. accelerator.. Scientists predict that its very-high-energy proton collisions will yield extraordinary discoveries about the nature of the physical universe.. Beyond revealing a new world of unknown particles, the LHC experiments could explain why those particles exist and behave as they do.. The LHC experiments could reveal.. the origins of mass.. , shed light on.. dark matter.. , uncover.. hidden symmetries of the universe.. , and possibly find.. extra dimensions of space.. When the LHC reaches full power, billions of protons in its two counter-rotating particle beams will smash together at an energy of 14 trillion electron volts.. After injection, the LHC.. accelerates.. a beam of hair-thin proton beams to a whisker below the speed of light.. The beams circulate for hours, guided around the LHC ring by thousands of powerful superconducting magnets.. For most of their split-second journey around the ring, the beams travel in two separate vacuum pipes, but at four points they collide in the hearts of the main experiments, known by their acronyms: ALICE, ATLAS, CMS and LHCb.. The experiments' complex detectors could see up to 600 million.. collisions.. per second, as the energy of colliding protons transforms fleetingly into a plethora of exotic particles.. In the data from these ultrahigh-energy collisions scientists from universities and laboratories around the world will search for the tracks of particles whose existence would transform the human understanding of the universe we live in.. US LHC Bloggers.. I am an assistant professor at Boston University working on the ATLAS experiment.. Specifically I focus on searches for exotic physics and studies of the top quark, and I am now working as the coordinator of the muon trigger for ATLAS.. I have been on ATLAS since 2005 when I started as a postdoc at Harvard.. I moved to BU as faculty in 2010.. Author's Blog.. Author's Bio.. I am an assistant professor at the University of Nebraska-Lincoln, involved with the CMS experiment at the LHC and the DØ experiment at Fermilab.. Since 2005 I have been the project manager for the 7 US CMS Tier-2 computing sites, and I also co-lead a working group at Fermilab's LHC Physics Center.. Kyle Cranmer.. I am an assistant professor at New York University and a member of the Center for Cosmology and Particle Physics.. I'm a member of the ATLAS Collaboration, though much of my work applies more broadly and I dabble in some other experiments.. My primary research focus  ...   in computers and programming in high school.. I actually decided to take programming instead of physics in my final year!.. I'm a postdoc working on the ATLAS experiment.. I'm based full-time at CERN and employed by Southern Methodist University.. Although I work for a US institute, I'm actually British and gained my undergraduate degree at Oxford.. I then studied as a graduate student at Brunel University in London, and from there I moved to California to take part in research at SLAC National Laboratory.. I'm a post-doc at Yale working on the ALICE experiment, where I hope to study the hot matter we call the Quark-Gluon Plasma (QGP) produced in heavy ion collisions at the LHC.. In particular I will be looking at jets, which are streams of particles that come from quarks or gluons that have a large energy.. The way in which jets are modified as they travel through the QGP can tell us a great deal of its underlying properties.. I grew up in Connecticut, and after 14 years of living in California, it is a little strange to back home.. I am a professor at Boston University and an experimental high-energy physicist.. I have been a member of the CMS experiment at the CERN Large Hadron Collider since 1994 and have worked full time on this project since 2000.. My scientific interest in the LHC is understanding the big-picture view of the mechanism of electroweak symmetry breaking.. I'm a graduate student in theoretical particle physics at Cornell University.. My research focuses on physics "beyond the Standard Model," such as supersymmetry and extra dimensions, and how such physics might manifest itself at the LHC.. I am currently a postdoc researcher with Columbia University Nevis Laboratories, working on the ATLAS Experiment and living in Geneva.. Right now my research interests include looking for new physics involving highly "boosted" top quarks, or top quarks that are created with a very high momentum.. These tops are so boosted in fact, that if they decide to decay into a b-quark and a hadronically-decaying W boson, the decay products merge into a single big jet.. To understand these properly, it becomes extremely important to study and measure the properties of jets that contain substructure.. Additionally, during the long LHC shutdown that starts in 2013, I'll be spending a lot of time working underground in the ATLAS cavern on the Liquid Argon Calorimeter.. US LHC Blogger Alumni.. US ALICE bloggers.. US ATLAS bloggers.. Denis Damazio.. US CMS bloggers.. Jake Anderson.. Pamela Klabbers.. Sue Ann Koay.. Vivian O'Dell.. Rice University Bloggers.. LHC bloggers..

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  • Title: Quantum Diaries
    Descriptive info: Seth Zenz | USLHC | USA.. This entry was posted on Monday, October 22nd, 2012 at 5:52 am and is filed under..

    Original link path: /2012/10/22/are-the-higgs-rumors-true/
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