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I think that, since the peaking background and the signal have similar shapes, it will be very difficult to further minimize the bias, which is at the moment at the level of ~3/550 ~ 5x10-3. Concezio. On Thu, 2006-04-13 at 13:09 -0700, Antonio Petrella wrote: > Hi all, > > I have updated my web page > http://www.slac.stanford.edu/~petrella/mesfits/mesfits.html with the > latest studies on Thorsten's signal pdf. > > I used only Thorsten's signal pdf to fit signal MC. Here the bias > (defined as number of entries in histogram - number of events fitted) is > very little. Then I fitted all MC adding the argus and crystall ball to > describe the background. In this case the bias is higher, outside the 1 > sigma error, but not as large as when I tried with gauz as signal PDF. > > The fit on data doesn't look good, probably I have to relax some parameters. > > I also looked at the chisquared scaling: most probably something is > wrong since the fit gives back the same values when I use different > multiplying error factors. > > Any suggestions? > > Ciao > Antonio > >