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Branching fraction and photon energy spectrum for b -> s gamma
| dc.contributor.author | Ammar, Raymond G. | |
| dc.contributor.author | Bean, Alice | |
| dc.contributor.author | Besson, David Zeke | |
| dc.contributor.author | Zhao, X. | |
| dc.date.accessioned | 2007-04-09T23:45:50Z | |
| dc.date.available | 2007-04-09T23:45:50Z | |
| dc.date.issued | 2001-12 | |
| dc.identifier.citation | Chen, S, Hinson, JW, et al. Branching fraction and photon energy spectrum for b -> s gamma. PHYSICAL REVIEW LETTERS. December 2001. 87(25) | |
| dc.identifier.other | http://publish.aps.org/ | |
| dc.identifier.uri | http://hdl.handle.net/1808/1321 | |
| dc.description.abstract | We have measured the branching fraction and photon energy spectrum for the radiative penguin process b --> s gamma. We find B(b --> s gamma) = (3.21 +/- 0.43 +/- 0.27(-0.10)(+0.18)) x 10(-4), where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV, (E gamma) = 2.346 +/- 0.032 +/- 0.011 GeV, and (E-gamma(2)) - (E-gamma)(2) = 0.0226 +/- 0.0066 +/- 0.0020 GeV2, where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/M-B(3) and beta (o)alpha (2)(s)) the heavy quark effective theory parameter <(<Lambda>)over bar> = 0.35 +/- 0.08 +/- 0.10 GeV. | |
| dc.language.iso | en_US | |
| dc.publisher | AMERICAN PHYSICAL SOC | |
| dc.title | Branching fraction and photon energy spectrum for b -> s gamma | |
| dc.type | Article | |
| dc.rights.accessrights | openAccess |
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