W PRODUCTION SUBGROUP

• Goals

  a "hot" topic for ZEUS and H1 ! Both H1 and ZEUS use EPVEC generator for W production. Recent calculation of this process using COMPHEP package showed some disagreements with EPVEC (regions of phase space absent in EPVEC)

  Hence, Project = compare deeply into details W production calculation by EPVEC, COMPHEP and GRACE, understand the differences. Consider higher order corrections.

• Starting Point
  • Try to improve EPVEC. Discuss with the authors and seek to implement LO QCD corrections. Once it is done, evaluate the effect on the cross section (and its error) and on hadronic final state distributions.

  • Comparison of EPVEC and COMPHEP-based W generator. Generate events with the new generator and compare distributions with EPVEC. Especially, investigate the backward, low-Pt peak of the decay lepton which is reported by M.Dubinin. Does it show up in current analysis?

  • Possibly also try GRACE for W production, and compare with others.

• People

  Ascii file of onvolved people with email adresses can be found here. Send us a mail if you wish to contribute to this subgroup.