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Belgian contributions to physics at LEP

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3 ongoing Ph D theses: mix of ALEPH data analysis and CMS trigger development. publications ... all theses are now completed ... ALEPH-CMS theses. analysis sw ... – PowerPoint PPT presentation

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Title: Belgian contributions to physics at LEP


1
Belgian contributions tophysics at LEP
OPAL
ALEPH
Major Belgian contribution to LEP
contribution to analysis
DELPHI
L3
Catherine De Clercq - IIHE,Vrije Universiteit
Brussel
RECFA 9 May 2003
2
DELPHI
3
Belgian participation in DELPHI
FWO funding
Universitaire Instelling Antwerpen
Vrije Universiteit Brussel
IIHE
Université Libre de Bruxelles
FNRS funding
Université de Mons Hainaut
Represented as one institute in DELPHI (board
) 15 à 20 physicists
4
20 years in DELPHItotal numbers
1982-2002
  • Funding - 3,0 M
  • 2,1 M for detector RD construction graphics
    system
  • 0.9 M for Maintenance and Operation of detector
  • manpower - 30 M
  • 330 personyears of physicists effort
  • 220 personyears of technicians engineers
    effort
  • publications
  • 300 DELPHI papers in refereed journals with
    lt15gt Belgian authors
  • 90 preprints and DELPHI notes by Belgian group
  • seminars and conference talks
  • 80 national international talks by Belgian
    group
  • theses
  • 27 mémoires de licences / licentiaatsverhandelinge
    n (diplom thesis)
  • 13 completed Ph D theses

5
Detector RD and construction1982-1989
  • End Cap Muon Chambers
  • 748 drift chambers mounted in 17 Quadrants
  • read out, trigger slow controlls hw sw
  • simulation, reconstruction,calibration,muon
    identification sw
  • Barrel muon chambers Oxford, RAL
  • Muon subtrigger
  • barrelendcap Muon Chambers TOF HOF
    scintillators
  • Common Belgian effort
  • drift chambers elements IIHE(ULB-VUB), UMons
  • quadrant assembly IIHE (ULB-VUB)
  • readout trigger UAntwerpen, IIHE(ULB-VUB)
  • Funding
  • 1,8 M 1,6 M (0.8 FWO 0.8 FNRS) 0,2 M ULB

6
Detector RD and construction1982-1989
  • Technical manpower
  • 139 personyears in total
  • lab technical staff, students, engineers,short
    term contract technicians
  • university staff paid by funding agencies
  • Physicists
  • 8 diplom theses
  • 5 engin/comp, 3 phys
  • 2 Ph D theses (physics dept)
  • 15 seminars and conf talks
  • 20 DELPHI notes preprints

persons
23
5
5
2
7
End cap muon chambers
8
Belgian responsibilities in offline software
  • Offline reconstruction software
  • DELANA event reconstruction
  • DELSIM detector simulation
  • TANAGRA data management sw
  • High performance graphics system
  • DELGRA event viewing sw
  • Funding graphics station
  • 40 k UMons 180 k ULBruxelles
  • Manpower
  • 2 seniors, 2 Ph D, technical staff computing
    teams
  • Publications
  • 1 diplom thesis
  • 15 DELPHI notes preprints
  • 7 seminars conf talks

9
Data taking 1989-2000
  • Maintenance of End Cap Muon Chambers
  • only 1 broken wire in 12 years of operation
  • one gas accident - recovered
  • daily data monitoring _at_ Brussels
  • Central trigger
  • upgrades, support
  • Data processing offline reconstruction
  • 1 full time senior physicist
  • Shifts, run coordination
  • all physicists

74 personyears
  • Engineers
  • 24 personyears - 4 persons
  • technicianscomputing staff
  • 50 personyears - 9 persons
  • Detector responsible physicist _at_ CERN
  • 1989-1994 2 phys per year
  • 1 permanent FNRS (4 CERN paid associates 1 Ph
    D)
  • 1995-2000 1 FTE Ph D student per year

10
Data taking1989-2000
  • Surround Muon Chambers (SMC)
  • fill gap between barrel end caps - 1994 onwards
  • offline reconstruction sw IIHE (ULB-VUB)
  • Ring Imaging Cherenkov Detector (RICH)
  • detector optimisation (gas,slow controll)
  • particle identification
  • contribution from U Mons
  • Funding MO
  • 75 k per year 900 k total
  • 1/2 FWO 1/2 FNRS
  • 1/3 commun fund 2/3 Muon Chambers maintenance

11
Physics analysis
4106 Z0 events
Precision measurements at LEP I
  • lineshape, AFB
  • lineshape, AFB below Z peak
  • polarisation, decay, AFB, lineshape, ?t mass
  • FB asymmetry, partial width
  • FB asymmetry
  • two-particle correlations
  • 13 diplom theses
  • 5 Ph D theses

12
Physics analysis
  • W-boson physics at LEP 200
  • cross section
  • W mass and width
  • Charged Triple Gauge boson Couplings (cTGC)
  • Spin Density Matrix, W polarisation, CP-violating
    cTGCs
  • Bose-Einstein Correlations (inside,inter W)
  • Search for new particles
  • at LEP 1 and LEP 200
  • neutral Higgs boson
  • SUSY particles charginos
  • 3 diplom theses
  • 3 Ph D theses
  • 3 diplom theses
  • 3 Ph D theses

13
Scientific manpower
  • 37 Physicists
  • 339 personyears

Senior staff - py
!! FWO permanent research positions !! no longer
existing - transferred to Univs
14
Ph D statistics
20 Ph D started
13 theses completed
15
Publications
93 Belgian DELPHI notes, preprints
300 published papers up to now 1992 papers 19
Be authors on 550 in total (3,5) 1997 papers
14 Be authors on 540 in total (2,6) 2002 papers
10 Be authors on 380 in total (2,6)
hardware
physics
16
Conference talks, seminars
80 Belgian seminars conference talks
17
ALEPH
18
Belgian contribution to ALEPH

Université Catholique de Louvain (UCL)
  • UCL joined ALEPH in 2001
  • individual participations before 2001
  • responsibilities
  • development maintenance of ALPHA (C
    analysis framework)
  • preparation of data archiving
  • physics
  • single W production cross section TGCs
  • Higgs to WW, invisible Higgs, charged Higgs
  • monojets
  • Manpower
  • 1 senior, 1 postdoc, 3 Ph D
  • 10 , 20 , lt30gt
  • 2,5 personyears equivalent
  • theses
  • 2 diplom theses
  • 3 ongoing Ph D theses mix of ALEPH data analysis
    and CMS trigger development
  • publications
  • 6 ALEPH notes/preprints
  • 4 authors on ALEPH publications

19
LEP activity is still going on!
  • Belgian activity in DELPHI will continue till
    2004
  • all theses are now completed
  • WW physics analyses (W mass width, SDM, BE
    correlations) need at least another 6 months to
    complete
  • still many publications to come - expect 8 Be
    authors in 2004
  • Belgian contribution to ALEPH will continue
  • mixed ALEPH-CMS theses
  • analysis sw responsibilities
  • DELPHI will be reopened for visits at end of 2003
    important for outreach

20
Belgian visitors to DELPHI
teachers
VIP
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