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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 >