Measurement of the B -> X-s gamma branching fraction and photon energy spectrum using the recoil method
(2008) Measurement of the B -> X-s gamma branching fraction and photon energy spectrum using the recoil method. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.77 (No.5). Article No.051103 . ISSN 1550-7998 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.77.051103
We present a measurement of the branching fraction and photon-energy spectrum for the decay B -> X-s gamma using data from the BABAR experiment. The data sample corresponds to an integrated luminosity of 210 fb(-1), from which approximately 680 000 B (B) over bar events are tagged by a fully reconstructed hadronic decay of one of the B mesons. In the decay of the second B meson, an isolated high-energy photon is identified. We measure B(B -> X-s gamma) = (3.66 +/- 0.85(stat) +/- 0.60(syst)) x 10(-4) for photon energies E-gamma above 1.9 GeV in the B rest frame. From the measured spectrum we calculate the first and second moments for different minimum photon energies, which are used to extract the heavy-quark parameters m(b) and mu(2)(pi). In addition, measurements of the direct CP asymmetry and isospin asymmetry are presented.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy
Q Science > QC Physics
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Physical Review D (Particles, Fields, Gravitation and Cosmology)|
|Publisher:||American Physical Society|
|Official Date:||March 2008|
|Number of Pages:||8|
|Page Range:||Article No.051103|
|Access rights to Published version:||Restricted or Subscription Access|
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