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