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Vub measurement using recoil of fully reconstructed Bs

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Subject:
From:
Daniele del Re <[log in to unmask]>
Date:
05 Jun 2002 17:02:54 -0700 (PDT)Wed, 05 Jun 2002 17:02:54 -0700 (PDT)
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Hi all,

 I repeated the comparison data-generic MC with a different selection on
neutrals and charged tracks.

 GTVL = Good track very loose
 GPL  = Good photon loose

 the table of plots is in

 http://www.slac.stanford.edu/~daniele/vub/GTVL_GPL.html

 and you can compare with the first column in the table in the page

 http://www.slac.stanford.edu/~daniele/vub/disagree.html

 for the usual selction (charged tracks + Alessio's neutral selection)

  What I notice is the following

 mm2: large improvement after lepton cut
      small improvement after all cuts

 mxhad: still bad after lepton cut (MC shift, data unchanged)
        - after all cuts  (I have to fix this plot)

 mxhadfit: level of comparison almost unchanged


  As far as these three variables are concerned it seems that the data do
not change so much while the MC has a dramatic change (between the
original and the new selection)


 BUT I see very bad comparison in the total number of NEUTRALS nad CHARGED
TRACKS. Again MC change dramatically.
 The total charge plot is pretty different than before. Now the bin at
zero has more entries in data (before was in MC).


 Urs, do you confirm my observations?


 Daniele




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