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High Energy Physics

High Energy Physics. at the University of Oregon. Accelerator-based Non-accelerator Theory. Standard Model. What is the universe made of? How does it interact?. Standard Model very successful, but incomplete…. Outstanding Questions. What causes mass? What breaks EW symmetry?

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High Energy Physics

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  1. High Energy Physics at the University of Oregon • Accelerator-based • Non-accelerator • Theory

  2. Standard Model • What is the universe made of? • How does it interact? Standard Model very successful, but incomplete…

  3. Outstanding Questions • What causes mass? • What breaks EW symmetry? • Are there additional symmetries to nature? • Are there extra dimensions? • Why matter (not antimatter)? • What is dark matter? • And many more…

  4. Experimental HEP Faculty Jim Brau Ray Frey Eric Torrence David Strom

  5. Theoretical HEP Faculty Nilendra Deshpande Dave Soper Stephen Hsu

  6. HEP Accelerator Labs NuTev Opal BaBar SLD Truly global field UofO well connected

  7. Oregon Experiments (Finishing)

  8. Oregon Experiments (Running) High LuminosityAsymmetric e+e- B-Factory (SLAC) Gravity Wave Interferometer (Hanford)

  9. 1 TeV Linear Collider (Future) e+e- -> HZ • Precise Higgs studies • Supersymmetry • Extra dimensions or ??? • Precision electroweak • Interesting for new students U Oregon groupis VERY involved

  10. Brau US exec committee co-chair Vertex Detectors convener Strom New Physics convener Calorimetry Frey Calorimetry convener Torrence Beam Instrumentation convenor Oregon LC Involvement (ALCPG)

  11. Oregon Students + PostDocs • SLAC • Jan Strube (BaBar) • Olya Igonkina (BaBar postdoc) • Minghui Lu (BaBar postdoc) • Nick Sinev (senior scientist) • Hanford • Masahiro Ito (LIGO/UO) • Rauha Rahkola (LIGO/UO) • Robert Schofield (LIGO postdoc) • Oregon • Dave Mason (NuTev) • Sean Walston (SLD) • Chris Potter (BaBar) • Isabel Leonor (LIGO postdoc) • Newer Students • Nick Blount • Jeffrey Early • Brian Stubbs • Rahmat • Eric Fitzgerald Stable funding (DOE/NSF), serious students welcome

  12. BaBar Physics • High Luminosity • Asymmetric e+e- 200M BB, tt sinceNov 99, double by 06! • Measure CP violation Matter-antimatter • Rare B decays => New physics • Tau lepton physics

  13. CP Violation in B0 decays Btag BCP e- (9 GeV) e+ (3 GeV) • Fully reconstruct one B0 (or B0) as a tag • Reconstruct second B in CP eigenstate (J/yKS vs. J/yKL) • Time dependence => CP violation bg = 0.56 Dz ~250 mm

  14. Rare B Decays b -> s g (penguins) • Forbidden in SM at tree level • Highly sensitive to new physics (eg: SUSY) • Measure branching fractions to 10-6 or better • Many channels, good thesis topics… B0 -> t+t- (Chris Potter Thesis)

  15. Rare Tau Decays • Neutrino data indicates Lepton Flavor Violation: nm <=> nt • Search for charged version • Signature: 3 charged leptons with no missing momentum m- t- m+ m- t- -> m-m+m- World’s best limits: B(t->lll) < (1-3) x10-7 (90% CL)

  16. Local Activities • BaBar RPC Teststand Beginning Grad and UG detector work • NLC Calorimeter Development • NLC Physics Studies • NLC Beam Instrumentation Prototypes

  17. SiW Calorimetry for LC • Large Area (6” Si) • 5 mm hex pixel • Integrated Readout • Cheap(ish)

  18. HEP Grad Student Education • Quantum Mechanics • Relativity • Computing • Programming • Analysis Skills • Advanced Statistics • Simulation Methods • Hardware Techniques • Electronics • Presentation Skills • Collaboration Skills • Very Broad Education • Useful in ‘real world’ • Can follow interests • ‘Apprentice’ system Greatly rewards motivated individuals

  19. HEP Accelerator Timeline 2000 2005 2010 2015 SLD • Neutrino experiments • Particle astrophysics • LIGO OPAL BaBar/Belle Tevatron II LHC NLC? The future of High Energy Particle Physics is bright

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