The Manchester group on DØ at the Fermilab Tevatron proton-antiproton collider

Manchester ‘Christmas’ Meeting 2003 Terry Wyatt

• Tevatron/DØ status• Manchester group activities• Terry’s activities 2003• Terry’s activities 2004

The Fermilab Tevatron Collider

• 1.96 TeV in centre of mass• Current good quality dataset

for physics analysis > 200 pb-1

• Hope for 2 fb-1 by end 2006:~ 106 leptonic W decays ~ 105 leptonic Z decays ~ 2000 semi-leptonic t decays

• Hope for 4-8 fb-1 by end 2009

Main Injector(new)

Tevatron

DØCDF

Chicago

p source

Booster

CDF DØ

Tevatron performance history

The DØ Detector

Most Important Remaining Problems

• Tevatron:– Luminosity delivered so far much lower than

hoped for

• DØ:– Achievable L1 trigger rate below design

• tracking detector readout deadtime– Calorimeter noise– Online/offline monitoring needs more

development

Design:

L1 L2 L3 tape 5 kHz 1 kHz 50 Hz

Currently:

L1 L2 L3 tape 1.5 kHz 800 Hz 50 Hz

By June 2004:L1 L2 L3 tape 2.5 kHz 1 kHz 50 Hz

The Manchester DØ Group

• 6 PhD students:– Simon, Emily, Tamsin, James, Paul, Yu-Hsiang

• 2 Postocs:– Matthew* , Michiel

• 3 Academics:– Brian, Stefan, Terry

• Plus small fractions of Sabah, Scott and Dave• Plus ties to:

– Manchester HEP theory group:• Mike Seymour and Jeff Forshaw jointly supervise Emily and James

– Physics studies overlap with Manchester Atlas group

* PPARC Postdoc fellowship starting later this month

• Ex-members of Manchester group staying in DØ:– Gavin Hesketh (PhD 2003, now Northeastern University, Boston, US)– Liang Han (starting new DØ group at USTC, P.R.China)

• There are DØ groups of a similar size at Imperial College and Lancaster• UK-DØ rating upgraded to 9 by PPRP in 2003

Manchester Activities on DØtracking muon id.

triggering monitoring

physics analysis: W/Z searches diffractive processes

plus contribution of Manchester farm to DØ data processing

Terry’s Activities 2003• Employed by Fermilab as Guest Scientist (until March 2003)

– Convener of the L3 trigger group– General work on developing triggers/commissioning trigger system

• PPARC Senior Research Fellowship (April 2003-March 2006)– Convener of DØ ‘WZ’ physics working group– Physics/technical work via collaboration with:

• Emily and Paul (WZ physics)• Simon and Liang (tau tagging)• Liang and Yu-Hsiang (track trigger)• CDF+DØ combined electroweak working group

– Electroweak review speaker at Lepton-Photon conference• Blah, blah:

– Chair of DØ ‘Institutional Board’ (elected)– Member of DØ ‘Advisory Council’ (ex officio) – Member of DØ ‘Computing Policy Board’– Contact person/budget holder for UK-DØ group – Manchester DØ group admin.

• Non-DØ work– Referee for Phys.Rev.D and Phys.Rev.Lett.– Member of LHCC

Terry’s Activities 2004My main aim is to analyse data myself !! (as well as continuing to work with members of the Manchester group and fulfill my various organizational responsibilities to DØ)• W/Z leptons:

– physics analysis • e.g., σ•Br (Wl) / σ•Br (Zll)• e.g., Br (We) / Br (W)

– statistical uncertainty ~1 per mille– a vehicle to:

• understand detector performance • develop triggers and measure their performance • understand QCD phenomenology of proton-antiproton

collisions– essential (for DØ as a whole) to get non-Fermilab-based analysis

up and running• genuine collaboration on analysis within European groups

would be a very positive development in this regard