CDF Introduction

Joseph Kroll – Penn DOE Site Visit – 10 August 2006

Context of these presentations

Past year CDF has focused on analyzing 1 fb-1 of data

Penn group has focused on data analysis as well

Penn CDF Group has made major contributions to CDF II& made a major investment in Run II

The Tevatron back in operation after 14 week shutdown:• > 1.7 fb-1 delivered to both CDF & DØ• pbar stacking almost back to pre-shutdown perform.• back up to peak luminosity performance• > 4 fb-1 is feasible

Penn committed to capitalizing on our investment in Run IIFocus on flagship physics (mt, ms) and discoveryContinuing contributions to operations

• Hardware– Run IIa: COT, TOF, Calorimeter calibration electronics

– Run IIb: Level 2 trigger upgrade

– personnel devoted to proposing, designing, constructing, installing, commissioning above hardware

• Operations– maintaining above hardware

– continued leadership roles and assume new leadership roles

– more responsibilities: trigger, COT tracking, Si alignment, calibrations

• Data analysis & Physics– Primary contributions to flagship analyses unique to Run II

– top physics, Bs mixing, SUSY & Higgs searches

– Primary authors of 1st PRL (D cross-section) and 1st high pT PRL (top cross-section from dileptons)

Our Investment in Run II

Current Personnel

Faculty: J. Kroll, N. Lockyer, E. Thomson, H. H. Williams

Post-docs: A. Canepa (9/06), A. Heijboer, C. Neu, D. Whiteson

Graduate Students: J. Keung (Sum. 07), E. Pianori (Spr. 07), T. Rodriguez, Y. Tu

Staff: J. Heinrich, P. Keener, W. Kononenko, G. Mayers, M. N. Newcomer, R. Van Berg

Past Personnel Contributing to Progress Report

Post-docs: A. Kraan – now a EU Marie Curie Fellow P. Wittich – now an assistant professor at Cornell

Students: K. Hahn (now post-doc at MIT on CMS) A. Kovalev (investment company) D. Usynin (investment company)

3 dissertations completed this past year

Contributions to Run IIb

• Trigger Level 2 decision crate upgrade – responsible for back-end of system including trigger decision

– initial leadership from Peter Wittich

– Daniel Whiteson (PD) & Kristian Hahn (GS) drove back-end effort• help from Paul Keener (staff) here

– Chris Neu (PD) shared responsibility for reCES part of system• required splitting optical signals using active splitters

– Replaced alpha based Run IIa system in April 2005

– Duplicate system runs parasitically allows real time development without using beam time

– participating in routine operation (pager responsibilities)

– D. Whiteson: Level 2 Software Coordinator

20K contributed from UPenn

Contributions to Operations (continued)

• On-line beam profile monitoring with SVT– Chris Neu working with Luciano Ristori (then CDF co-spokesperson)

• Silicon alignment – Aart Heijboer took over from Ray Culbertson (FNAL) in Fall 2004

• Calibration coordination– Aafke Kraan: Mar. 2005 to Mar. 2006

– Daniel Whiteson: Apr. 2006 to present

• TOF pager duties

• Data taking shifts (Aces, Scico’s)

Leadership in Physics

• N. Lockyer: co-spokesperson – 2002 to 2004

• J. Kroll: co-leader Bs mixing effort – 2004 to present

• E. Thomson: co-leader top group – Apr. 2004 to Apr. 2006

• Aart Heijboer: co-leader BPAK subgroup

• Chris Neu: co-leader b-tag subgroup – Nov. 2005 to present

• Daniel Whiteson: – top MC coordinator – Aug. 2004 to Mar. 2006

– co-leader top mass subgroup – began Aug. 2006

• Joel Heinrich: member CDF statistics committee

Physics Highlights

• top– major leadership role

– cross section measurements

– mass using matrix el. method

– W Helicity

• SUSY– dilepton searches (e)

– adding leptons

• Higgs search– Wbb, Z!bb, WZ

• b-tagging for top and Higgs

• Bs flavor oscillations

– major leadership role

– leading role in analysis of significance, combining channels, measuring ms

– used analytic methods to speed up fit by orders of magnitude

• B fragmentation studies– crucial for flavor tagging too

More details in presentations that follow

B PhysicsHigh pT physics

Focus on flagship measurementsContinue search for new physics

Publications

Primary authors or major contributors to nine publications:

First PRL from Run IIFirst high pT PRL

PhD: C. Chen

Publications From Progress Report

1st precise measurement of ms

PhD: K. Hahn

PhD: A. Kovalev

• Major role – both in leadership and analysis• Run I

– 1st fully reconstructed B meson at hadron collider – 1st measurement of Bs lifetime in J/ final state– Development of b flavor identification techniques for md & sin2

• Run II– TOF– charm cross section– established method for developing opposite-side b flavor tags– contributions to trigger strategy and trigger improvements– fragmentation studies for same-side flavor tags– central role in analysis, primary authors of publication

Penn’s Role in Bs Oscillations

Hughes

Azfar

Long, Gao

Chen

Usynin

PhD Students

Plans for Upcoming Year

• Physics– top (Neu, Thomson, Williams, Whiteson)

• cross-section

• mass

• Wbb

– Bs mixing (Heijboer, Kroll)

– SUSY searches & EW (Canepa, Keung, Lockyer, Pianori, Rodriguez, Tu)

– Higgs (Neu)

• Operations– TOF (Heijboer)

– L2 (Neu, Whiteson)

– Calibrations (Whiteson)

– Si alignment (Heijboer)

Committed to getting lotsof physics out of Run II data