期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.241801
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资金
- MEXT
- JSPS
- Nagoya's TLPRC (Japan)
- ARC
- DIISR
- A. J. Slocum (Australia)
- NSFC (China)
- DST (India)
- MOEHRD and KOSEF (Korea)
- MNiSW (Poland)
- MES and RFAAE (Russia)
- ARRS (Slovenia)
- SNSF (Switzerland)
- NSC and MOE (Taiwan)
- DOE (USA)
Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B -> X-s gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B -> X-s gamma)=(3.45 +/- 0.15 +/- 0.40)x10(-4), where the errors are statistical and systematic.
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