Journal article
Measurement of the moments of the photon energy spectrum in B→Xsγ decays and determination of
C Schwanda, P Urquijo, E Barberio, A Limosani, I Adachi, H Aihara, K Arinstein, T Aushev, S Bahinipati, AM Bakich, V Balagura, I Bedny, K Belous, U Bitenc, A Bondar, A Bozek, M Bračko, MC Chang, A Chen, WT Chen Show all
Physical Review D Particles Fields Gravitation and Cosmology | AMER PHYSICAL SOC | Published : 2008
Abstract
Using the previous Belle measurement of the inclusive photon energy in B→Xsγ decays, we determine the first and second moments of this spectrum for minimum photon energies in the B meson rest frame ranging from 1.8 to 2.3 GeV. Combining these measurements with recent Belle data on the lepton energy and hadronic mass moments in B→Xcℓν decays, we perform fits to theoretical expressions derived in the 1S and kinetic mass schemes and extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element Vcb, the b-quark mass, and other nonperturbative parameters. In the 1S scheme analysis we find |Vcb|=(41.56±0.68(fit)±0.08(τB))×10-3 and mb1S=(4.723±0.055)GeV. In the kinetic scheme, we obtain |Vc..
View full abstractGrants
Awarded by National Natural Science Foundation of China
Funding Acknowledgements
We thank the theorists working on the 1S scheme: C.W. Bauer, Z. Ligeti, M. Luke, A.V. Manohar, and M. Trott, and those working on the kinetic scheme: P. Gambino, N. Uraltsev, and I. Bigi for providing the Mathematica and Fortran codes that describe the respective calculations. We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the National Institute of Informatics for valuable computing and SINET3 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology of Japan and the Japan Society for the Promotion of Science; the Australian Research Council, the Australian Department of Education, Science and Training; the National Natural Science Foundation of China under Contracts No. 10575109 and No. 10775142; the Department of Science and Technology