Hi urs,
I just made a sanity check, of course we should use the decay.dec ones ...
I just wanted to make sure there was no fancy source of semileptonic
events
ciao
ric
______________________________________________________
Riccardo Faccini
Universita' "La Sapienza" & I.N.F.N. Roma
tel +39/06/49914457 Fax.: +39/06/4957697
http://www.slac.stanford.edu/~rfaccini
Univ. La Sapienza. 2,Ple Aldo Moro, I-00185 Roma Dipartimento di Fisica
"We need serenity to accept what we cannot change, courage to change what
we can and wisdom to distinguish between the two" [R. Kiplin, allegedly]
On Thu, 13 Feb 2003, Urs Langenegger wrote:
>
> Hoi Ric,
>
> why don't we take the "correct" value of 10.4% for b2c as in decay.dec
> to which your simuboot checks will converge if you use enough
> statistics? And why don't we subtract the b2u instead of dividing?
>
> Cheers,
> --U.
>
>
> Riccardo Faccini writes:
> > > Riccardo is verifying that the total BR corresponds to 10.4% looking at
> > > MC truth at generator level.
> > >
> > I run at simuboot level over 110K generic Bch and 110K generic B0 with no
> > selection whatever and I counted the number of events with a semileptonic B at generator
> > level.
> >
> > I counted 10.56+/-0.04 % , consistent between electrons and muons, B0 and
> > Bch.
> >
> > In order to get the Br(b->clnu) one needs to divide by 1.0123 in order to
> > subtract the Vub component and therefore
> >
> > Br(b->clnu) in generic =(10.43 +/- 0.04)%
> >
> > Ric
>
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