 |
 |
Hello, I just noticed that the filtering on leptons and photons above a certain energy cut is (most likely) not an option for the bsg analysis as for the branching fraction measurement we need to normalise to an unbiased B sample and so the full Breco sample. This is how it has been done for Fabio's thesis. Requiring a lepton or photon with a certain energy will most likely bias our normalisation sample, e.g. all B->charged hadron decays would be lost, a fraction of the SL decays etc. The reason why the b->ulv analysis can live with this cut is because they measure a double ratio of branching fractions, so they can normalise to a sample with the same cuts applied. At the moment I can't see how we can get around this but appreciate any ideas! Cheers, Henning