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High Energy Physics at U T A

High Energy Physics at U T A. Andrew Brandt, Kaushik De, Andrew White, Jae Yu, + 5 post-docs, 6 grad students, and many undergrads. What is High Energy Physics?. Matter/Forces at the most fundamental level. Great progress! The “ STANDARD MODEL ” BUT… many mysteries

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High Energy Physics at U T A

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  1. High Energy Physics at UTA Andrew Brandt, Kaushik De, Andrew White, Jae Yu, + 5 post-docs, 6 grad students, and many undergrads

  2. What is High Energy Physics? • Matter/Forces at the most fundamental level. • Great progress! The “STANDARD MODEL” • BUT… many mysteries • => Why so many quarks/leptons?? • => Why four forces?? Unification? • => Where does mass come from?? • => Are there higher symmetries?? • => What is the “dark matter”??

  3. YOU can perform fundamental research using world’s highest • energy particle accelerators: • UTA’s four HEP faculty, many grad students and post-docs are part of • collaborations at Fermilab, CERN, and Brookhaven, investigating the Origin of • Mass (Higgs Searches), Supersymmetry, Extra-dimensions, QCD and • Forward Physics. • YOU can build state-of-the-art detectors: • UTA’s Swift Center Detector Laboratory is a fully equipped • 10,000 sq ft construction facility; in 2004 there will be new • facilities at a brand new Science Building. • YOU candevelop “The GRID”, the next step beyond the Internet: • UTA faculty leading international efforts in this area, we have a 50 processor • high performance computing farm, and a GRID test-bed. • (Visit us at UTA Science Hall or http://www-hep.uta.edu) Why High Energy Physics At UTA??

  4. The DZero Experiment •  World’s highest energy collisions (2 TeV) • >120 Physics papers published! (includes Top quark discovery in 1995) •  Now starting new 5-year run • => look for “Higgs Boson”, Supersymmetry • and many other possible new phenomena • UTA faculty has leadership roles: Andrew Brandt: Forward Proton Detector Leader Andrew White: Intercryostat Detector Leader Jae Yu: Remote Analysis/GRID computing coordinator •  Many opportunities for good Ph.D. theses !!

  5. Tevatron: World’s Highest Energy Collider Fermilab DØ One of the DØ Forward Proton Detectors built at UTA and installed in the Tevatron tunnel

  6. Search for the Higgs: the Origin of Mass? For MH< 135, H  bb decay mode dominates • FNAL Tevatron: • Discovery? H  bb MH<135 GeV • Maybe H  WW/ZZ MH>135 GeV • CERN LHC: look for H  WW or ZZ • Depending on what is found at FNAL Run II

  7. Supersymmetry (SUSY) is an elegant extension of the Standard Model (SM) Solves the Higgs mass fine tuning problem by introducing super-partners Supersymmetry (SUSY) • Allows Grand Unification of low energy gauge couplings • Provides candidate for cold dark matter

  8. The CERN Large Hadron Collider Location of LHC in France and Switzerland, with lake Geneva and the Alps in the background Proton-proton collisions at 14 TeV The ATLAS detector is currently being built at UTA and at 100's of other institutions all over the world

  9. Building Calorimeter Modules at UTA • Project led by Kaushik De • Built 130 modules at UTA • Several year project • Many students involved

  10. UTA HEP Computing Resources • Largest offsite computing facility for Run I • Current UTA system: • 24 dual 866MHz processor Linux PC’s • 0.5GB RAM per machine • 0.61 TB total disk storage • UTA developed MC job control & monitoring software • To date over 3.3 million events generated in 6 Mo. for Run II • Second farm of five dual 866MHz Linux cpu in CSE recently added • Promotes inter-departmental collaboration • UTA CSE interested in GRID development • Human resources: • Four faculty members • Two Research scientists • 1 Computing professional consultant (20hr/week) • 3 FTE CSE undergraduate and graduate students

  11. High Energy Physics Training + Jobs • EXPERIENCE: • Problem solving • Data analysis • Detector construction • State-of-the-art high speed electronics • Computing (C++, Python, Linux, etc.) • Presentation • Travel • JOBS: • Post-docs/faculty positions • High-tech industry • Computer programming and development • Financial

  12. HEPfarm at UTA UTA PC FARM CSEfarm at UTA 24 dual 866MHz Ten 866MHz …… …… Existinginfrastructure Planned expansion – Short Term ATLASfarm at UTA Planned extension – Longer Term Remotedesktopmachines (canbeanywherein the world)

  13. US ATLAS Data Grid Testbed U Michigan Boston University ESnet, Mren UC Berkeley LBNL-NERSC NPACI, Abilene Argonne National Laboratory Calren Esnet, Abilene, Nton Brookhaven National Laboratory University of Oklahoma ESnet Abilene Indiana University University of Texas at Arlington HPSS sites

  14. Structure of Matter Matter Molecule Atom Nucleus Baryon Quark (Hadron) u 10-14m cm 10-9m 10-10m 10-15m <10-19m Chemistry protons, neutrons, mesons, etc. p,W,L... top, bottom, charm, strange, up, down Atomic Physics Nuclear Physics Electron (Lepton) <10-18m High Energy Physics

  15. Muon Tracks Charged Particle Tracks Energy Scintillating Fiber Silicon Tracking Calorimeter (dense) Interaction Point Absorber Material Ä B EM hadronic electron photon Wire Chambers jet muon neutrino -- or any non-interacting particle missing transverse momentum We know x,y starting momenta is zero, but along the z axis it is not, so many of our measurements are in the xy plane, or transverse Particle Detection

  16. The Standard Model Standard Model has been very successful but has too many parameters, does not explain origin of mass. Continue to probe and attempt to extend model. • Current list of elementary (i.e. indivisible) particles • Antiparticles have opposite charge, same mass • the strong force is different! • new property, color charge • confinement - not usual 1/r2

  17. p The DZero Forward Proton Detector Bellows Roman Pot p Detector P1UP P2OUT S Q3 Q4 Q2 Q4 Q3 Q2 S D D2 D1 P1DN P2IN A2 A1 59 57 33 23 0 23 33 Z(m) Series of 18 Roman Pots forms 9 independent momentum spectrometers allowing measurement of proton and anti-proton momentum and angle. FPD Scintillating Fiber Detector

  18. Jet Production CH “calorimeter jet” hadrons FH  EM “particle jet” Time “parton jet” Highest ET dijet event at DØ • Fixed cone-size jets • Add up towers • Iterative algorithm • Jet quantities:

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