Tuesday 6th July 1999
                                                Ian Tomalin

                  MINUTES OF THE 34th BEW MEETING
                 =================================
Agenda
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192-196 GeV dilepton results: E. Merle

192-196 GeV hadronic cross section: M.-N. Minard

Single Top Production at 192-196 GeV: M. Pepe-Altarelli


N.B. All results based on L = 27 pb**-1 at 192 GeV and 24 pb**-1
     at 196 GeV.


192-196 GeV dilepton results: E. Merle
---------------------------------------

Agreement between data and MC, all ditau and dielectron cross
sections both somewhat high. Systematic errors not yet estimated.
Results, e.g., Exclusive at 196 GeV:

  mu: sigma = 2.77+-0.33 pb (SM=2.46)  ; Afb = 0.55+-0.10 (SM=0.57)
 tau:         3.36+-0.47 pb (   2.55)  ; Afb = 0.62+-0.17 (   0.57)
   e:        17.51+-0.89 pb (   16.55) 

The tau cross section is always very high in cos(theta) > 0.9 bin.
Events scanned but no obvious explanation found.

192-196 GeV hadronic cross section: M.-N. Minard
-------------------------------------------------
Again good agreement. e.g. Exclusive at 196 GeV:
   q: sigma = 18.25 +- 1.08 +- 0.32 pb (SM=17.65)


Single Top Production at 192-196 GeV: M. Pepe-Altarelli
--------------------------------------------------------
Analysis updated by summer student P. Giovannangeli, with able 
assistance from Fabio, Monica and Mario ! Cuts were reoptimized at 
196 GeV, giving higher efficiency but more background. Cuts not 
reoptimized at 192 GeV as no MC available. The numbers of candidates 
seen for channels where the W from top decays leptonically or 
hadronically are:

                    Leptonic             Hadronic
   192 GeV:     Data=0 (SM=0.2)       Data=3 (SM=1.3)
   196 GeV:     Data=0 (SM=0.1)       Data=3 (SM=2.6)

Total: Data=6 (SM=4.2). If the "signal" seen at 189 GeV was real,
then we would expect 4.2+3.8 = 8.0 events. Therefore new results
consistent both with signal hypothesis and with no signal one.
  => More luminosity needed.