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Vub measurement using recoil of fully reconstructed Bs

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Subject:
From:
Riccardo Faccini <[log in to unmask]>
Date:
10 Nov 2003 10:30:28 -0800 (PST)Mon, 10 Nov 2003 10:30:28 -0800 (PST)
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the typical purity cut is, seed by seed,
ipurDstar        0.24
ipurDc           0.09
ipurDstar0       0.08
ipurD0           0.09
so it might well be that after the cuts there is no difference. Can you
try and apply these cuts?
	ciao
	ric


______________________________________________________
Riccardo Faccini
Universita' "La Sapienza" & I.N.F.N. Roma
tel  +39/06/49914798 Fax.: +39/06/4957697
http://www.slac.stanford.edu/~rfaccini
Univ. La Sapienza. 2,Ple Aldo Moro, I-00185 Roma Dipartimento di Fisica

"I don't understand what you say, but I believe I disagree" W.D.

On Mon, 10 Nov 2003, Kerstin Tackmann wrote:

>
> Hi Ric,
>
> I had a look at these variables in the 2000 file.
> For the pur, the differences are below 0.1 for both charged and neutral B
> and for intpur the differences are between 35 and 40 for neutral B and
> between 55 and 60 for charged B. Does this make sense?
>
> Thanks,
> Kerstin
>
>
> On Mon, 10 Nov 2003, Riccardo Faccini wrote:
>
> > Hi Kerstin,
> > my bet is that the differences are due to small fixes to the semiexcl
> > algorithm that were done in time. The differences should concentrate at
> > low purities. can you please compare the purB0 and intpurB0 (and ChB
> > correspondingly) distributions to see where the differences are ?
> > 	they do no more look worrisome to me
> > 	ciao
> > 	ric
> >
> > ______________________________________________________
> > Riccardo Faccini
> > Universita' "La Sapienza" & I.N.F.N. Roma
> > tel  +39/06/49914798 Fax.: +39/06/4957697
> > http://www.slac.stanford.edu/~rfaccini
> > Univ. La Sapienza. 2,Ple Aldo Moro, I-00185 Roma Dipartimento di Fisica
> >
> > "I don't understand what you say, but I believe I disagree" W.D.
> >
> > On Mon, 10 Nov 2003, Kerstin Tackmann wrote:
> >
> > >
> > > Hello,
> > >
> > > after correcting the pidtables link we are still seing small differences
> > > for the 2000 file: 925 overall entries instead of 926, 644 entries in
> > > modeB0 instead of 632 and 615 entries in modeChB instead of 618.
> > >
> > > What might these differences be due to? Could these result from different
> > > random number seeds for the pid killing?
> > >
> > > Do I have to adjust the tables link for the tracking efficiency as well?
> > >
> > > Thanks,
> > > Kerstin
> > >
> > >
> >
>



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