Hi
I have posted on this webpage:
http://www.slac.stanford.edu/~petrella/mesfits/parameters.html
the study on the variations of pdf parameters as function of run period
and B charge.
Background pdf and signal pdf have been fitted separately first, then
all MC has been fitted using the parameters obtained. In the last fit
(all mc) 3 parameters are free to float.
My comments:
- parameter n for Cutoff crystall ball has very large error, sometimes
it was necessary to fix it to 20 (i.e. the tail was forced to go to 0
very soon otherwise this function would fit half of the events at very
low mes (5.22))
- parameter n for signal function (again the tail) is very sensitive on
the B charge.
I can start to examine the yields now.
Antonio
|