Hoi,
the full set of data/MC validations for Q = 0 ('Q0') and |Q| <=1
('Q1') is available at
http://www.slac.stanford.edu/~ursl/talks/070302/comp.ps.gz
There are four columns with plots, the two on the left are for Q0 and
the two on the right for Q1.
Observations:
o Significantly more statistics in the Q1 case, with (usually) similar
systematic differences between data/MC. This implies that the
chi2/ndof will be worse for Q1
o Electrons look marginally better in Q1 than Q0, muons a bit worse.
o Enhanced and depleted charged tracks are worse and better,
respectively in Q1. Neutrals generally a bit worse.
o No big change in Mx. Looking at the ratio, it seems that the low
tail for Mxhadfit is a bit better described in Q1 than in Q0. The
largest difference is that the B0 and B+ shapes in MC agree much
better in Q1 compared to Q0 (where they are different). (This was
visible on a previous posting.)
o The track multiplicity is bad in Q1 compared to Q0 in the enhanced
sample. No improvement for the neutral multiplicity.
o MM2: The left tail is better described in Q0 the enhanced sample.
o Qtot is comparable in both cases (no, it's not necessarily the
same, because it's after all cuts).
Cheers,
--U.
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