HEP Experiment at Penn
Joseph Kroll
for
the Penn High Energy Group
Enquiring Minds Want to Know
What are the fundamentalConstituents of matter?
What are the forces (interactions) that governtheir behavior?
Overview of Penn HEP
Current Experiments:
1.Sudbury Neutrino Observatory (SNO)
2.Collider Detector at Fermilab (CDF)
3.BaBar detector at SLAC
4.ATLAS detector at CERN LHC
Distinguishing Features
World class electronics capabilities
Instrumentation specialists: Newcomer, Van Berg
Advanced computing techniques and data acquisition
(Kamiokande from 1984 to 1990 SNO since 1988
CDF since 1984Babar since 1995ATLAS since 1995
Experienced well-established groups
Long history in neutrino astrophysics (theory Langacker)
Sudbury Neutrino Observatory
Faculty: Beier
Staff: Heintzelman, Van Berg
Postdocs: McCauley, Oser, Future hire
Grad students: Dunford, Kyba, Rusu
Neutrino Physics at SNO
Solve solar neutrino problem
Demonstrate neutrinos oscillate
Understand why/howNeutrinos change flavor
Test astrophysics of sun
Past Thesis Topics
Doug McDonaldStudies of the Sudbury Neutrino Observatory Detector andSonoluminescence using a Sonoluminescent Source (1999)
Peter WittichFirst Measurement of the Flux of Solar Neutrinos fromthe Sun at the Sudbury Neutrino Observatory (2000)Now a postdoc with Penn on CDF
Mark NeubauerEvidence for Electron Neutrino Flavor Change Through Measurement of the 8B Solar Neutrino Flux at theSudbury Neutrino Detector (2001)Now a postdoc with MIT on CDF
Present Thesis Topics
Vadim Rusu (4th year)Model-Independent Measurement of the Neutral CurrentFlux from Salt Data at SNO (anticipated 2003)Accepted Fermi Fellow at University of Chicago
Chris Kyba (3rd year)Measurement of Atmospheric Neutrino Interactions at SNO
Monica Dunford (2nd year)Measurement of the Neutral Current Flux fromSNO’s Neutral Current Detectors
Future Thesis Topics
Limits/Detection of Matter Effects of NeutrinosIn the Earth Through Day-Night Effects
Measurement of the Solar Neutrino Energy Spectrum at SNO
World’s Best Measurement of the Solar Neutrino MixingAngle from SNO’s Neutral Current Detectors
Search for Violations of Baryon Number inNeutron-Antineutron Oscillations
Limits on Anti-neutrino Appearance in the Solar Neutrino Flux
SNO Hardware Opportunities
Penn maintains allSNO electronics
Opportunities toDesign new electronics:Rusu: GPS clock boardDunford: crate backplane
Work in an active Nickel Mine!
SNO: Makes you Famous!
CDF
Installation of Silicon Tracking Device(L00, SVX, ISL) – Fall 2000
CDF rolls in to collision hall – Winter 2001
At the energy frontier at the Fermilab Tevatron (p-antip)
CDF Personnel
Faculty:Kroll, Lockyer, Williams
Postdocs:Ambrose, Jones, Nakamura,Oldeman, Wittich
Staff: Heinrich, Kononenko
Graduate Students:Chen, Hahn, Kovalev, Usynin, Yu
CDF Hardware Opportunities
Penn made major contributions to three parts CDF II:
Central Outer Tracker electronicsTime of flightCentral calorimeter calibration electronics
These systems need to be maintained
Particle identification (important for heavy flavor and exotics)
Major opportunity to improve dE/dx and TOF particle id
Level II trigger upgrade
Involves analysis of data from existing systems
Hardware, firmware (FPGA), software
Design and prototyping phase
CDF Grad Student ContributionsChunhui Chen: TOF proposal and electronicsThesis: Measurement of the Direct Charm Production Cross-section (defended 3/28/03)
Kristian Hahn:COT electronics, Level II trigger upgradeData analysis: top dileptons
Andrew Kovalev:Calorimeter calibration electronicsThesis: Search for new physics in dileptons with missing energy
Denys Usynin:TOF electronicsData analysis: heavy flavor physics, flavor identification in lepton data sample
Eiko Yu:COT electronics, dE/dx for particle identificationThesis topic: b baryon decays b
CDF Successful Thesis Defense
CDF Physics
Physics divides into five physics groups:
1. QCD2. Electroweak3. Top quark physics4. Heavy Flavors (charm and bottom)5. Exotics (search for physics beyond SM)
Penn group focused on top, heavy flavors, and exotics
Data are rolling in (finally) – lots of thesis topics
Flavor Physics at
Our goal is to explore CP-violation through the observation and measurement of asymmetries and rare decays of B0 mesons using the PEP-II asymmetric collider and the BABAR detector
Personnel at Penn
Faculty:
L. Gladney, (A. Ryd)
Post-Docs:P. Behera and J. Panetta
Graduate Student:
Q. Guo
PEP-II has delivered115 fb-1 of data
BABAR has recorded99.4 fb-1 of this
By June of 2003, weexpect to collect atleast another 25 fb-1
Goal for late 2005 is500 fb-1 collected.Unprecedented inHEP.
Tons of data fortheses!Tons of data for theses!
cp
cp
sin2 = 0.755 0.074 sin2 = 0.723 0.158
PRL 89 (2002) 201802
Measurement of sin2=0.741 0.067 0.034
What’s Left To Do?• The Standard Model has a single source for CP-violation
(CPV) and makes quantitative predictions• New symmetries in nature can provide new sources of
flavor and CPV with significant deviations from Standard Model predictions
* Generic extra dimensions with SM in bulk * Minimal Supersymmetric Standard Model * Supersoft SUSY breaking with Dirac gauginos * etc.
• Searches for new physics will likely focus on loop corrections in the theory – this is where Penn will focus in the next three years
b sγ sum of exclusive channels, photon polarization
search for very rare decay modes
ATLAS Experiment at CERN
The future energy frontier in accelerator physics
ATLAS Installation
Most of the surface building will be handed over to ATLAS this year (Oct-Nov 2002)
Underground civil Underground civil engineering will engineering will end in Spring 2003end in Spring 2003
ATLAS will start installation at Point-1 in April 2003
Excavation ended in May 2002
PENN ATLAS TRT ElectronicsFaculty: Williams, (Ryd)
Staff: Alexander, Dressnandt, Keener, Kononenko, Newcomer, Scherzer, Van Berg
Postdocs: Munar, Rohne
Visitors: Ryjov, Szczgiel
End Cap Module (1 of 72 total)
End of Barrel Module
You will see this on the tour this afternoon
Electronics at End of Barrel
Again, you will see this on the tour
425K Channels required
Excellent opportunity toGet experience with electronicsDesign, fabrication, testing
ATLAS Physics
Schedule:Start detector installation: 2004Detector commissioning: 2006Data taking for theses: 2008
Physics at the energy frontier:EWK symmetry breakingHiggs Boson, SUSY
This incoming class is the firstThat can consider ATLAS forthesis research
Top Related