Ciao Franco, > I have few questions about your study. > 1) Why is delta_e of the B-reco correlated with the M_nu resolution ? the correlation is with the deltaE of the recoil (and you can see why, I guess...) > 2) You do not seem to have statistical problems. Why not using higher > purity sample ? ok this might help in the next point, making the shape easier. > 3) The structure of the m_nu distribution seems to be more complicated > than a double gaussian: you maybe need to describe it better befor you > can draw conclusions on the resolution. I must admit I still do not have a smart way out on how to extract smearing parameters. ciao ric