Transcript High Energy Physics - University of Oregon

High Energy
Physics
at the
University of
Oregon
Standard Model
What is the universe
made of?
How does it interact?
Standard Model very
successful, but incomplete…
Outstanding Questions
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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…
Experimental HEP Faculty
Jim Brau
Ray Frey
David Strom
Eric Torrence
Theoretical HEP Faculty
Rudy Hwa
Nilendra Deshpande
Dave Soper
Stephen Hsu
HEP Laboratories
NuTev
Opal
BaBar
SLD
Truly global field
UofO well connected
Oregon Experiments (Finishing)
Oregon Experiments (Running)
High Luminosity
Asymmetric e+eB-Factory
(SLAC)
Gravity Wave
Interferometer
(Hanford)
Linear Collider (Future)
Precise Higgs studies
Supersymmetry
Extra dimensions or ???
Precision electroweak
Interesting for new students
U Oregon group
is VERY involved
e+e- -> HZ
BaBar Physics
High Luminosity
 Asymmetric e+e100M BB, tt already!
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Measure CP violation
Matter-antimatter
Rare B decays
New physics
Tau lepton physics
CP Violation in B0 decays
e- (9 GeV)
bg = 0.56
Btag
BCP
Dz
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e+ (3 GeV)
~250 mm
Fully reconstruct one
B0 (or B0) as a tag
Reconstruct second B
in CP eigenstate
(J/yKS vs. J/yKL)
Time dependence
=> CP violation
Rare B Decays
b -> s g (penguins)
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B0 -> t+t-
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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 topic…
Tau Magnetic Moment
t+
g
Vector
+
Tensor
+ …
tat = (gt-2)/2 =
p-
nt
Events
t-
0
a/2p
+
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t- -> nt pst = +1/2
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st = -1/2
Momentum
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+ …
Expected at ~ 0.001
Observed |at| < 0.04
Use decay momenta to
analyze tau spin
Measure t+t- spin
correlations
Sensitive to new physics
Oregon Students + PostDocs
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SLAC
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Hanford
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Chris Potter (BaBar)
Matt Langston (SLD)
Olya Igonkina (BaBar postdoc)
Nick Sinev (senior scientist)
Masahiro Ito (LIGO)
Rauha Rahkola (LIGO)
Robert Schofield (LIGO postdoc)
Oregon
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Dave Mason (NuTev)
Sean Walston (SLD)
Isabel Leonor (LIGO postdoc)
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Newer Students
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Nick Blount
Jeffrey Early
Jan Strube
Brian Stubbs
Rahmat Rahmat
Stable funding (DOE/NSF), serious students welcome
HEP Grad Student Education
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Very Broad Education
Useful in ‘real world’
Can follow interests
‘Apprentice’ system
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Quantum Mechanics
Relativity
Computing
Programming
Analysis Skills
Advanced Statistics
Simulation Methods
Hardware Techniques
Electronics
Presentation Skills
Collaboration Skills
Greatly rewards motivated individuals
HEP Accelerator Timeline
2000
2005
2010
2015
SLD
OPAL
BaBar/Belle
Tevatron II
LHC
NLC?
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Neutrino experiments
Particle astrophysics
LIGO
The future of High Energy
Particle Physics is bright