Tuesday 22nd June 1999
                                                Ian Tomalin

            MINUTES OF THE 33rd BEW MEETING (ALEPH week)
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Agenda
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Update on 192-196 GeV difermion results: M.-N. Minard

Excited Lepton production at 189 GeV: J. von Wimmersperg 


Update on 192-196 GeV difermion results: M.-N. Minard
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  All results fairly consistent with SM predictions, except
that Bhabha cross section is somewhat low. At 192 GeV, more
BHWIDE e+e- MC must be generated to improve precision of SM
predictions. The efficiency for radiative dimuon events is
dropping as Ecms rises, as the muons are boosted into the
forward detector regions.

Excited Lepton production at 189 GeV: J. von Wimmersperg 
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 Full details of this analysis can be found in ALEPH-CONF/99-042.
No signal is seen. The only surprise is that far fewer dimuon events
where a photon is reconstructed in the detector, are seen in data
as compared to MC. This will be treated as a systematic error.
A few improvements have been made to the analysis since last Spring.
In particular, new MC for the SM nu nu gamma process is used which
includes t-channel W exchange. Furthermore, the performance of the
selection is improved as a result a better methods of choosing which
lepton photon pair combinations to plot in a given event.