I forgot to mention that the straight horrizontal lines that run across
the plots are the values we expect the "data" points should be.
---------- Forwarded message ----------
Date: Tue, 30 Jan 2007 17:00:26 +0000 (GMT)
From: CHUKWUDI KWEKU CLARKE <[log in to unmask]>
To: Antonio Petrella <[log in to unmask]>
Cc: vub-recoil <[log in to unmask]>
Subject: quick look @ Asymmetry
Hi all. Below is a link to some plots I produced using the Rel-14 VVF and 3pdf
model.
http://www.slac.stanford.edu/~clarke1/protected/clarke1/Asym.html
I'm using the Generic MC as "Data".
I look at the Asymmetry and Br(B->X_{u}lnu) (for charged and neutral Bs) in
Run1-2, 3 and 4. As you can see the Asymmetry varies a lot with increasing
q2cut and also Run-by-Run.
Althougth the Asymmetry varies a lot the Br(B->X_{u}lnu)s don't. I think due to
the nature of the Asymmetry equation (see below) small fluctuations in charged
and neutral Br(B->X_{u}lnu)s gives rise to large Asymmetries.
Br(B->X_{u}lnu)Neu * rtau - Br(B->X_{u}lnu)Ch
Asymmetry (For MC)= --------------------------------------------------
Br(B->X_{u}lnu)Neu * rtau + Br(B->X_{u}lnu)Ch
Br(B->X_{u}lnu)Neu = the Br(B->X_{u}lnu) for neutral Bs
Br(B->X_{u}lnu)Ch = the Br(B->X_{u}lnu) for charged Bs
rtau = ratio of lifetimes of charged and neutral Bs.
Cheers, C.C.
