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Hi, On Wed, 5 Jul 2006, Antonio Petrella wrote: > Hi, > > we also computed a correction factor for the signal/peaking bkg using > the entire mx distribution, not a bin by bin. > > In this case the fit looks better, with respect to the bin by bin one: > > http://www.slac.stanford.edu/~petrella/tmp/scra/Ibutest_fix129/test_fix129fitresults.eps > http://www.slac.stanford.edu/~petrella/tmp/scra/Ibutest_fixed/test_fixedfitresults.eps Indeed, but this effect is driven by the fact that the we have the two mX bins with large statistics where the fit was bad such that the correction for these bins became large. Averaging the correction factor over mX reduces this problem. Cheers. Heiko