High Energy High Energy PhysicsPhysics

at theat the

University of University of OregonOregon

Standard ModelStandard Model

What is the universe What is the universe made of?made of?

How does it interact?How does it interact?

Standard Model veryStandard Model verysuccessful, but incomplete…successful, but incomplete…

Outstanding QuestionsOutstanding Questions

What causes mass?What causes mass? What breaks EW symmetry?What breaks EW symmetry? Are there additional Are there additional

symmetries to nature?symmetries to nature? Are there extra dimensions?Are there extra dimensions? Why matter (not antimatter)?Why matter (not antimatter)? What is dark matter?What is dark matter? And many more…And many more…

Experimental HEP FacultyExperimental HEP Faculty

Jim BrauJim Brau Ray FreyRay Frey

David StromDavid Strom Eric TorrenceEric Torrence

Theoretical HEP FacultyTheoretical HEP Faculty

Rudy HwaRudy Hwa Nilendra DeshpandeNilendra Deshpande

Dave SoperDave Soper Stephen HsuStephen Hsu

HEP LaboratoriesHEP Laboratories

BaBarBaBarSLDSLD

NuTevNuTev

OpalOpal

Truly global fieldTruly global fieldUofO well connectedUofO well connected

Oregon Experiments (Finishing)Oregon Experiments (Finishing)

Oregon Experiments (Running)Oregon Experiments (Running)

High LuminosityHigh LuminosityAsymmetric eAsymmetric e++ee--

B-FactoryB-Factory(SLAC)(SLAC)

Gravity WaveGravity WaveInterferometerInterferometer(Hanford)(Hanford)

Linear Collider (Future)Linear Collider (Future)

ee++ee-- -> HZ -> HZPrecise Higgs studiesPrecise Higgs studiesSupersymmetrySupersymmetryExtra dimensions or ???Extra dimensions or ???Precision electroweakPrecision electroweakInteresting for new studentsInteresting for new students

U Oregon groupU Oregon groupis is VERYVERY involved involved

BaBar PhysicsBaBar Physics

High LuminosityHigh Luminosity Asymmetric eAsymmetric e++ee--

100M BB, 100M BB, already! already!

Measure CP violationMeasure CP violation

Matter-antimatterMatter-antimatter Rare B decaysRare B decays

New physicsNew physics Tau lepton physicsTau lepton physics

CP Violation in BCP Violation in B00 decays decays

Fully reconstruct one Fully reconstruct one BB00 (or B (or B00) as a tag) as a tag

Reconstruct second B Reconstruct second B in CP eigenstatein CP eigenstate (J/ (J/S S vs. J/vs. J/LL))

Time dependence Time dependence => CP violation=> CP violation

ee-- (9 GeV) (9 GeV) ee++ (3 GeV) (3 GeV)

= 0.56= 0.56

BBtagtag BBCPCP

zz ~250 ~250 mm

Rare B DecaysRare B Decays

Forbidden in SM Forbidden in SM at tree levelat tree level

Highly sensitive to new Highly sensitive to new physics (eg: SUSY)physics (eg: SUSY)

Measure branching Measure branching fractions to 10fractions to 10-6-6 or better or better

Many channels, good Many channels, good thesis topic…thesis topic…

b -> s b -> s (penguins)(penguins)

BB00 -> ->

Tau Magnetic MomentTau Magnetic Moment

Expected Expected aa ~ 0.001 ~ 0.001

Observed |Observed |aa Use decay momenta to Use decay momenta to

analyze tau spinanalyze tau spin Measure Measure spin spin

correlationscorrelations Sensitive to new physicsSensitive to new physics

++ + …+ …

aa = (g= (g-2)/2 = 0 + -2)/2 = 0 + /2/2 + … + …

TensorTensorVectorVector

Eve

nts

Eve

nts

MomentumMomentum

Oregon Students + PostDocsOregon Students + PostDocs SLACSLAC

Chris Potter (BaBar)Chris Potter (BaBar) Matt Langston (SLD)Matt Langston (SLD) Olya Igonkina (BaBar postdoc)Olya Igonkina (BaBar postdoc) Nick Sinev (senior scientist)Nick Sinev (senior scientist)

HanfordHanford Masahiro Ito (LIGO)Masahiro Ito (LIGO) Rauha Rahkola (LIGO)Rauha Rahkola (LIGO) Robert Schofield (LIGO postdoc)Robert Schofield (LIGO postdoc)

OregonOregon Dave Mason (NuTev)Dave Mason (NuTev) Sean Walston (SLD)Sean Walston (SLD) Isabel Leonor (LIGO postdoc)Isabel Leonor (LIGO postdoc)

Newer StudentsNewer Students Nick BlountNick Blount Jeffrey EarlyJeffrey Early Jan StrubeJan Strube Brian StubbsBrian Stubbs Rahmat RahmatRahmat Rahmat

Stable funding (DOE/NSF), serious students welcomeStable funding (DOE/NSF), serious students welcome

HEP Grad Student EducationHEP Grad Student Education Quantum MechanicsQuantum Mechanics RelativityRelativity ComputingComputing ProgrammingProgramming Analysis SkillsAnalysis Skills Advanced StatisticsAdvanced Statistics Simulation MethodsSimulation Methods Hardware TechniquesHardware Techniques ElectronicsElectronics Presentation SkillsPresentation Skills Collaboration SkillsCollaboration Skills

Very Broad EducationVery Broad Education Useful in ‘real world’Useful in ‘real world’ Can follow interestsCan follow interests ‘‘Apprentice’ system Apprentice’ system

Greatly rewards motivated individualsGreatly rewards motivated individuals

LHC

HEP Accelerator TimelineHEP Accelerator Timeline

Neutrino experimentsNeutrino experiments Particle astrophysicsParticle astrophysics LIGOLIGO

20002000 20052005 20102010

SLDSLD

OPALOPAL

BaBar/Belle

Tevatron IITevatron II

NLC?

20152015

The future of High EnergyThe future of High EnergyParticle Physics is brightParticle Physics is bright