Exclusive Measurements of the b to s gamma Transition Rate and Photon Energy Spectrum

Journal Article · Thu Aug 30 00:00:00 EDT 2012 · Phys.Rev.D86:052012,2012

OSTI ID:1049750

Lees, J P; Poireau, V; Tisserand, V; Garra Tico, J; Grauges, E; Palano, A; Eigen, G; Stugu, B; Brown, David Nathan; Kerth, L T; Kolomensky, Yu G; Lynch, G; Koch, H; Schroeder, T; Asgeirsson, D J; Hearty, C; Mattison, T S; McKenna, J A; Khan, A; Blinov, V E ; Buzykaev, A R

We use 429 fb{sup -1} of e{sup +}e{sup -} collision data collected at the {Upsilon}(4S) resonance with the BABAR detector to measure the radiative transition rate of b {yields} 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 {Beta}({bar B} {yields} Xs{gamma}) = (3.29 {+-} 0.19 {+-} 0.48) x 10{sup -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{sub b} and {mu}{sub {pi}}{sup 2}, in the kinetic and shape function models.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1049750
• Report Number(s): SLAC-PUB-15135; arXiv:1207.2520; TRN: US1204477
• Journal Information: Phys.Rev.D86:052012,2012, Journal Name: Phys.Rev.D86:052012,2012
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KINETICS
PHOTONS
RESONANCE
SHAPE
Experiment-HEP
HEPEX