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Vub measurement using recoil of fully reconstructed Bs

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Subject:
From:
Alessio Sarti <[log in to unmask]>
Date:
15 Feb 2003 01:55:27 -0800 (PST)Sat, 15 Feb 2003 01:55:27 -0800 (PST)
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Hi all,
I've crosschecked the numbers from Daniele and tried to vary the scaling
factor btw: 1.69 -- 1.82

The maximum variation of the central value was < 0.8% in both cases.
I'll provide soon the mes fits for each bin, togheter with the result of
weights calculated on generic.
Alessio

> Hi all,
>
>  today, at the meeting, we discussed about the scaling factor
> between generic and cocktail MC for the ratio
>
> lumi(hybrid)/lumi(pure non resonant)
>
> used in the weights calculation and the goodness of the mes fits. I
> applied a loose cut on the purity (intpur>.2)
>
>
>  These are the numbers:
>
>  +++++++++++++++++++++++++++++++++++++
>
>  nmix(cockMC) = 10366.3 +- 139.558
>  nnre(cockMC) = 12015.7 +- 148.974
>  nmix(geneMC) = 9764.37 +- 156.282
>  nnre(geneMC) = 6412.87 +- 127.174
>
>  +++++++++++++++++++++++++++++++++++++
>
>  ratio mix/nre cocktail = 0.862731
>  ratio mix/nre generic  = 1.52262
>
>  +++++++++++++++++++++++++++++++++++++
>
>  --->  ratio(ratio) generic/cocktail = 1.76489
>
>
>  very close to the one used by Alessio (1.74).
>
>
>  These are the fits
>
>  http://www.slac.stanford.edu/~daniele/vub/plots.eps
>
>
>  The quality of the fits looks reasonable.
>
>  Varying the cut on the purity (as a sanity/crosscheck) the result is
> stable:
>
>  intpur>.2    ratio(ratio) cocktail/generic = 1.76489
>  intpur>.3    ratio(ratio) cocktail/generic = 1.7804
>  intpur>.4    ratio(ratio) cocktail/generic = 1.82348
>  intpur>.5    ratio(ratio) cocktail/generic = 1.81961
>  intpur>.6    ratio(ratio) cocktail/generic = 1.74887
>  intpur>.7    ratio(ratio) cocktail/generic = 1.71669
>  intpur>.8    ratio(ratio) cocktail/generic = 1.69702
>
>
>  Alessio will show the fit results for each Mx bin in the weights
> calculation.
>
>
>  Daniele
>
>



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