Matter, Energy, Space, Time
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1 Matter, Energy, Space, Time UW UW UW UW UW UW UW UW Trails in Particle Physics Particle Physics at UW-Madison 1
2 Wisconsin program SLAC: e + e - Stanford, CA Babar: CP Violation FNAL Batavia, IL CDF: pp Energy Frontier MINOS: ν Oscillations DESY: ep Hamburg, Germany HERA: ZEUS Structure of Matter CERN: pp Geneva, Switzerland LHC: CMS & ATLAS: Next Energy Frontier Particle Physics at UW-Madison 2
3 Experimental HEP Broad and diverse program Funding: 45+ year history, 2nd largest US university grant U.S. Foreign Pheno Personae Dramatis faculty 9 scientists 10 engineers 3 post-docs 5 administrators 2 technicians 2 grad students 38 Particle Physics at UW-Madison 3
4 Infrastructure Electronics: design engineering prototyping Computing & Networking: graphics analysis display CAD DAQ Condor GRID Computing Mechanical: design precision alignment production Particle Physics at UW-Madison 4
5 Wisconsin Leadership CDF: Forward muon detector, muon drift tube upgrade Babar: Data Acquisition, forward muon system Zeus: W. Smith is trigger co-convenor, chair of US Zeus Institutes. UW group operates calorimeter trigger ATLAS: 2nd level trigger, silicon vertex electronics CMS: W. Smith is Trigger Project Manager, D. Loveless is US Endcap Muon System Project Manager and responsible for Endcap Steel. D. Reeder is Muon Institution Board Chair. Particle Physics at UW-Madison 5
6 Current Activities CDF ZEUS p p e ± p D. Carlsmith, M. Herndon L.G. Pondrom W. H. Smith D.D. Reeder BaBar e + R. Prepost, S. Dasu e- Y. Pan, S.L. Wu FNAL DESY SLAC Minos ν A. Erwin FNAL CMS (2007) p p W.H. Smith, D.D. Reeder D. Carlsmith, S. Dasu CERN Atlas (2007) p p Y. Pan S.L. Wu CERN Particle Physics at UW-Madison 6
7 CP Babar Professor R. Prepost Professor S. Dasu Professor Y. Pan Professor S. L. Wu Now taking data at record luminosity and publishing b-physics results e + e b b SLAC: PEP-II Stanford, CA Particle Physics at UW-Madison 7
8 CP Violation P parity -- inversion of right and left T time reversal -- invariance under t -t C charge conjugation -- particle antiparticle CP violation was first observed in strange quark weak interaction. It is now seen in bottom quark weak interactions and, in the standard model, is connected to mass generation via the Higgs mechanism. Precise measurements of CP violation parameters are being made by the Babar experiment. Particle Physics at UW-Madison 8
9 Prof. W. Smith Prof. D. Reeder DESY: HERA Hamburg, Germany UW built & operates calorimeter trigger Only lepton-hadron collider ever! Use ep collisions to study quarks and gluons in the proton New: x5 Luminosity upgrade & polarization now running Particle Physics at UW-Madison 9
10 e γ,w,z Structure of Matter e Scattering of electrons from constituent quarks provides an increasingly detailed view of the QCD dynamics inside a proton. p xf(x,q 2 ) H1 PDF 2000 ZEUS-S PDF jet remnant Q 2 =10 GeV xu V xg( 0.05) 0.4 xd V 0.3 xs( 0.05) x Particle Physics at UW-Madison 10
11 Energy Prof. L. Pondrom Prof. D. Carlsmith Setting new Luminosity records daily! Fermilab: Tevatron Batavia, IL UW built & operates muon chambers p p-bar collisions at 2 TeV Particle Physics at UW-Madison 11
12 Today,the highest masses are available in p-pbar collisions at Fermilab. CDF studies W & Z bosons, b & t quarks. Searches continue for new heavy particles, e.g. those req d by supersymmetric theories. Energy frontier CDF: tt=>wbwb W=>e nu W=>e nu b s=>hadrons Particle Physics at UW-Madison 12
13 Neutrino Prof. A. Erwin Neutrino Oscillation Limits Particle Physics at UW-Madison 13
14 New life in neutrinos Neutrinos are light compared to electrons but perhaps not massless. Recent observations suggest neutrinos have mass and neutrino flavors are mixed rather like quark flavors. Consequently, one flavor may oscillate into another flavor while traveling near light speed over distances measured in hundreds of km. MINOS just started data-taking for studying the oscillation. Particle Physics at UW-Madison 14
15 New CMS Prof. S. Dasu Prof. D. Carlsmith Prof. W. Smith Prof. D. Reeder CERN: LHC Geneva, Switzerland: pp at 14 TeV m m m m m Y ϕ X Towards Center of LHC PARA /11/94 jlb Transverse View Particle Physics at UW-Madison 15
16 New Atlas Prof. Y Pan Prof. S.L. Wu CERN: LHC Geneva, Switzerland pp at 14 TeV Particle Physics at UW-Madison 16
17 Search for Standard Model Higgs 120 < m H < 1000 GeV Search for Supersymmetry and other physics beyond the Standard Model quark/lepton compositeness new W /Z bosons or heavy quarks, leptons extra Dimensions? Physics at LHC Particle Physics at UW-Madison 17
18 HEP Students at work DESY DESY DESY DESY Fermilab DESY Doing Frontier Physics all over the world! CERN Particle Physics at UW-Madison 18
19 Summary Lots of opportunity Good Physics & Good Travel & Communication skills & Good friends & Good jobs fun and a rewarding education Welcome to the adventure! Particle Physics at UW-Madison 19
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