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Hi Urs,

>
> Hoi,
>
> I fitted  both data  and generic  MC with the  b2c shapes  from either
> generic  only or from  generic +  cocktail =  'All'. In  all different
> setups (except B0 on data) the  results with the shape from generic is
> systematically lower by 21-30%.  All  this is done with the 'official'
> files, and not yet constraining the fit.

as far as the fit on the data is concerned I see:

  - B0's go up using generic MC. In this case the difference is well
covered by the uncorrelated error calculated on the error due to MC
statistics (0.0028)
  - Bch's go down using generic MC and this is not covered by MC stat (~3
sigmas)

 But we should not be worried by these numbers since generic is mainly
done by SP4 and then the result on run1 could be completely screwed up.

  - total: the ratio Bch/B0 is 2 on generic instead of 1.5 (both data and
"ALL" MC). The  result can be then very different.

 I have some concerns about the stat error. I don't understand why it is
so lower. Urs, are you sure you are using the new mixing correction in
both?

 Same cosiderations can be done in the fit on the generic MC.

 Daniele


> ======================================================================
> Fitting data
> ----------------------------------------------------------------------
> B0:
> ---
> Generic:  BRBR = 0.0034528 +- 0.00577785(stat) +- 0.0036574(MC stat)
> All:      BRBR = 0.00267254 +- 0.00714268(stat) +- 0.00220775(MC stat)
> ----------------------------------------------------------------------
> B+:
> ---
> Generic:  BRBR = 0.0210934 +- 0.00441897(stat) +- 0.00225001(MC stat)
> All:      BRBR = 0.0267783 +- 0.00543305(stat) +- 0.0017851(MC stat)
> ----------------------------------------------------------------------
> B:
> --
> Generic:  BRBR = 0.0133686 +- 0.00347803(stat) +- 0.00185617(MC stat)
> All:      BRBR = 0.0169572 +- 0.00429294(stat) +- 0.00124563(MC stat)
> ======================================================================
> Fitting GENERIC MC as data
> ----------------------------------------------------------------------
> B0:
> ---
> Generic:  BRBR = 0.00982946 +- 0.00390754(stat) +- 0.00313629(MC stat)
> All:      BRBR = 0.012189 +- 0.00485377(stat) +- 0.00196494(MC stat)
> ----------------------------------------------------------------------
> B+:
> ---
> Generic:  BRBR = 0.00823618 +- 0.00270148(stat) +- 0.00220829(MC stat)
> All:      BRBR = 0.0106768 +- 0.00331714(stat) +- 0.00142229(MC stat)
> ----------------------------------------------------------------------
> B:
> ---
> Generic:  BRBR = 0.00843513 +- 0.00216119(stat) +- 0.001722(MC stat)
> All:      BRBR = 0.0109082 +- 0.00266792(stat) +- 0.00110181(MC stat)
> ---------------------------------------------------------------------
>
>
> Cheers,
> --U.
>