We use 429 fb(-1) of e(+)e(-) collision data collected at the Gamma(4S) resonance with the BABAR detector to measure the radiative transition rate of b -> s gamma with a sum of 38 exclusive final states. The inclusive branching fraction with a minimum photon energy of 1.9 GeV is found to be B((B) over bar -> X-s gamma) = (3.29 +/- 0.19 +/- 0.48) x 10(-4) where the first uncertainty is statistical and the second is systematic. We also measure the first and second moments of the photon energy spectrum and extract the best-fit values for the heavy-quark parameters, m(b) and mu(2)(pi), in the kinetic and shape function models.
Titolo: | Exclusive measurements of b -> s gamma transition rate and photon energy spectrum | |
Autori: | ||
Data di pubblicazione: | 2012 | |
Rivista: | ||
Handle: | http://hdl.handle.net/20.500.12571/136 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |