Hi all, I took the root files produced by Urs with different seeds for K PID (I think it is only K ID) and I ran the fit on them. I noticed that Urs ran on the 160 fb-1 MC and not on the full sample but who cares. This is the result default BRBR = 0.0202685 +- 0.00250473(stat) +- 0.00106675(MC stat) 4 different seeds BRBR = 0.0199513 +- 0.00250629(stat) +- 0.00108934(MC stat) BRBR = 0.0206593 +- 0.00250784(stat) +- 0.00108017(MC stat) BRBR = 0.0200895 +- 0.00249793(stat) +- 0.00109631(MC stat) BRBR = 0.0199593 +- 0.0025139(stat) +- 0.00111451(MC stat) One of the tests gave NaN because the data file was not there. I looks like we are not in a tail of the distribution even if, I must admit, we statistics is pretty poor. I would say that the test is very successful. Daniele