Status of L3

1
Status of L3

• Organization in 2002
• Activity in 2002
• Organization in 2003
• Outlook

Latest physics results in http//cern.ch/l3/conf
erences/ps/Mele_Jamboree.ps.gz http//cern.ch/l3/
conferences/ps/Alcaraz_Jamboree.ps.gz http//cern
.ch/l3/conferences/Amsterdam2002/index.html
2
Meetings in 2002
Organization in 2002

• Chair of management board (Juan Alcaraz)
• Analysis coordinators (Juan Alcaraz, SM)
• Analysis sub-group coordinators

• Three reviews of all analyses (2 to 4 days)
• Monday meetings of sub-group coordinators,
  off-line experts, Monte Carlo production, to
  organize/review the weekly activity
• Regular WW and two-photon group meetings
• Analysis meetings when needed (1 or 2 monthly)

3
Papering in 2002

• WW and two-photon analyses are discussed in
• sub-group meetings first and then in analysis
• meetings
• Other analyses are discussed at analysis
  meetings
• When deemed final, draft are prepared and
• discussed with prof. Ting
• Paper draft are processed by an editorial board
• with internal referees (chair SM)
• After two-four meeting they are released to all
• institute-leaders for final comments and sent to
• Physics Letters

4
Activity in 2002

• Produce almost all Monte Carlo still needed for W
  physics (complex QCD and higher order
  electroweak effects, millions of events)
• Prepare the transition of the software to the
  CERN linux cluster after dismission 31/12/2002 of
  the former L3 supercomputer
• Identify person-power pitfalls and optimise human
  resources (leaving students, post-docs) to
  complete analyses before departure, or leave
  enough information after departure.

5
13 papers published in 2002

• Search for a Higgs Boson Decaying into
  Two-Photons at LEP.
• Inclusive D- Production in Two-Photon
  Collisions at LEP.
• Lambda and Sigma zero Pair Production in
  Two-Photon Collisions at LEP.
• Determination of Alpha_s from Hadronic Event
  Shapes in ee- Annihilation at 192 lt root(s) lt
  209 GeV.
• The e e- -gt Z gamma gamma -gt q qbar gamma gamma
  Reaction at LEP and Constraints on Anomalous
  Quartic Gauge Boson Couplings.
• Measurement of Genuine Three-Particle
  Bose-Einstein Correlations in Hadronic Z Decay.
• Measurement of Bose-Einstein Correlations in ee-
  -gt WW- Events at LEP.
• Production of Single W Bosons at LEP and
  Measurement of WW gamma Gauge Coupling
  Parameters.
• Search for Single Top Production at LEP.
• Search for a Higgs Boson Decaying to Weak Boson
  Pairs at LEP.
• Inclusive Charged Hadron Production in Two-Photon
  Collisions at LEP.
• Measurement of W polarisation at LEP
• Study of the ee- -gt Zee- process at LEP

6
11 papers being processed

• Measurement of Branching Fractions of Tau
  Hadronic Decays
• Precision Electroweak measurements on the Z
  resonance
• Measurements of the Cross Sections for Open Charm
  and Beauty Production in gamma-gamma collisions
  at root(s)189-209 GeV
• Charged Lepton Pair Production in Two-Photon
  Collisions at LEP
• Fractal effects in Hadronic Z Decays
• Search for the Standard Model Higgs Boson at LEP
  (LEP Combination)
• QCD Studies in ee- Annihilation from 30 to 209
  GeV
• Search for Colour Reconnection effects in ee- -gt
  WW- -gt hadrons through Particle-Flow studies
• Measurement of Exclusive rho-rho Production in
  Two-Photon Collisions at High Q2 at LEP
• Proton Antiproton Pair Production in Two-Photon
  Collisions at LEP
• Search for Colour Singlet Exchange and Colour
  Reconnection Effects in Hadronic Z Decays from
  ee- Annihilation

7
Meetings in 2003
Organization in 2003

• Chair of management board and analysis
  coordinator (SM)
• Analysis sub-group coordinators

• No big changes wrt 2002
• Three long review of all activities (before
  winter/summer conferences and in fall)
• Monday scheduling meetings
• Regular WW and two-photon group meetings
• Analysis meetings when needed

8
Activity in 2003

• Complete in the first months all Monte Carlo
  production
• Complete/publish the main-stream subjects
• W Cross section, mass and couplings
• Fermion pair production
• Single photon production
• Main SUSY searches
• Running of electromagnetic coupling constant
• Complete as many as possible of the other
  analyses
• Gross estimate of 70 physics subjects
• Reasonable hopes of 30 publications

9
Outlook

• Still a lot of physics that might/will not be
  studied for lack of resources.
• Do all efforts to recover information from
  almost-completed analyses, complete what possible
  and publish it.
• Preparing a plan for dissolving the collaboration
  (SM)
• Review process for long-term analyses
• Reaction to possible new ideas
• Publication of data in a form usable by future
  experiments/theorists
• Expect high activity (by few FTE) till Summer
  conferences 2004