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Measurement of the B -> X-s gamma branching fraction and photon energy spectrum using the recoil method
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BABAR Collaboration (Including:
). (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 . doi:10.1103/PhysRevD.77.051103 ISSN 1550-7998.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.77.051103
Abstract
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 |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | March 2008 | ||||
| Dates: |
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| Volume: | Vol.77 | ||||
| Number: | No.5 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | Article No.051103 | ||||
| DOI: | 10.1103/PhysRevD.77.051103 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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