Koppenburg, P;
Abe, K;
Abe, K;
Abe, T;
Adachi, I;
Aihara, H;
Akatsu, M;
... Belle Collaboration; + view all
(2004)
Inclusive measurement of the photon energy spectrum in b -> s gamma decays.
PHYS REV LETT
, 93
(6)
, Article 061803. 10.1103/PhysRevLett.93.061803.
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Abstract
We report a fully inclusive measurement of the flavor changing neutral current decay b-->sgamma in the energy range 1.8 GeVless than or equal toE(gamma)(*)less than or equal to2.8 GeV, covering 95% of the total spectrum. Using 140 fb(-1), we obtain B(b-->sgamma)=(3.55+/-0.32(-0.31-0.07)(+0.30+0.11))x10(-4), where the errors are statistical, systematic, and from theory corrections. We also measure the first and second moments of the photon energy spectrum above 1.8 GeV and obtain <E-gamma>=2.292+/-0.026+/-0.034 GeV and <E-gamma(2)>-<E-gamma>(2)=0.0305+/-0.0074+/-0.0063 GeV2, where the errors are statistical and systematic.
| Type: | Article |
|---|---|
| Title: | Inclusive measurement of the photon energy spectrum in b -> s gamma decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.93.061803 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.93.061803 |
| Language: | English |
| Additional information: | The American Physical Society |
| Keywords: | BELLE DETECTOR |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1308437 |
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