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Subject: RE: New version %BR%
From: Greg Landsberg <landsberg@hep.brown.edu> %BR%
Date: Wed, 30 Aug 2006 19:41:32 -0400 %BR%
To: 'pedro mercadante' <mercadan@fnal.gov> %BR%
CC: "'Sergio M. Lietti'" <lietti@fnal.gov>

Hi Pedro,

Looks good, thanks! A few questions:

1) On the set of plots showing two backgrounds and the signal, I'd rather
normalize everything to the predicted cross section (and use log plot if
needed). That would give a clear clue to as how much larger the backgrounds
are than the signal, and also how much they are reduced by the likesign
requirement.

2) Add a plot of likesign pair invariant mass distribution for the set with
likesign cut. (You can put it in the first row on p. 11, to the right of the
opposite-sign mass distribution.)

3) Judging by your plots, reasonable cuts to try would be:
        - pT(leading lepton) < 30 !GeV; %BR%
        - M(opposite sign pair) < 80 !GeV for every opposite-sign pair in the event; %BR%
        - MET > 10-15 !GeV; %BR%
        - Njet(ET > 15 !GeV) > 0 and Sum jet ET > 30 !GeV;

Regards,

Greg

Topic revision: r1 - 2006-11-16 - SergioLietti

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