Hi Kerstin,
> At this point, we do no reweighting related to the B charge when we
> calculate the response matrix and the xini spectrum.
>
>
> This is what I found having a look at the VirVubFitter code:
>
> For signal MC the correctionfactor is correctionratiovub 0.969355, so it
> is something like a 3% effect. This factor is used to scale the charged B
> events of the signal MC that is used for the BRBR extraction.
>
> What I would do now is to apply this scaling factor to the truth
> level charged B events in the signal MC used for the determination of the
> response matrix and xini, leaving the neutral B events untouched.
> Do you agree that it can be done this way?
>
> We only expect a very small effect, given that the rescaling factors for the
> multiplicity categories are much more different from 1 (see Table 3 in
> BAD 894). We wonder if this rescaling should be done given the size of the
> weight.
If you are using vubmix-generic MC also for the response matrix and
the xini spectrum calculation the effect should be very small.
I agree with you. Do not waste time, just mention the size of the
difference between data and MC.
Daniele
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