Issues(meetings 22/04/03 )         Writing

see here for accessing the phone conference Weekly W mass meetings

1. CN productions (start asap when code is checked and endcaps calibn adjusted) Stephane

  v1.651?: 0) standard + type 4 recalib + 15deg cut, 1) m_jet=0, 2) chgd only, 3)-16) pcuts,cones
  v1.652?: 0) standard as v1.651 + no type 4,6 < 0.75 GeV, 1) m_jet=0, 2) chgd only, 3)-16) pcuts,cones
  Procedure for jet corrections: 'means' with cuts to remove gg and tau-tau (add these bkgds to check)
  Confirm all backgrounds added (ie tau pairs, Zee for lvqq, Zvv)
  Discard parametrisation for brems in evqq (brings ~2% reduction in stat error)
  New LEP energies available except for global shift - decide to remain with old values for now.
2. Special CNs  Andrea

  v1.65*: HCAL recalibration with barrel & endcaps, cf single pions data v MC
  v1.65*: Random track removal in MCs (fullsim, std) WW, bkgds at 189 , 207? GeV for systematics
3. WW cross sections

  qqqq: systematics from fragmentation Franco
  finalise all results after checks with v1.651
4. Zg in the q`q   channel :  Paolo

  What is the uncertainty on jet masses & boosts from MC (derived from allowed variation in
   tuned parameters for Z events in JETSET) G. Rudolph to be asked by Andrea, Roberto
  Summarise results
5. Systematics

  See this trial summary page. (to be completed/updated/modified and could be used as working basis)
Fragmentation: baryon re-weighting, extreme tunes from JETSET (or HERWIG) which still
  agree with data G. Rudolph to be asked by Andrea, Roberto
Jet energy corrections - comparison of two methods Franco
CR: AR1 (2 steps) and AR0 (2 steps) events generated by Brigitte to study AR2 - AR21 and
  AR2 - AR20. Ntuples made
Jet masses, type 4, 6 & all eflows  from v1.632, v1.633 data v MCs
Final Mass & Width analysis
Finalise binning and possible chi2 cut for MW extraction Patrice, John
Use O(alpha) weights
  LEP energies: tools needed to  apply corrections according to E_cm (data - MCref) mean
   values for each channel (17Mev/GeV in 4q channel).
   Systematics from differences in the spread - negligible?