Lee, YJ;
Wang, MZ;
Abe, K;
Abe, K;
Aihara, H;
Asano, Y;
Aulchenko, V;
... Belle Collaboration; + view all
(2005)
Observation of B+-> p(-)Lambda gamma.
PHYS REV LETT
, 95
(6)
, Article 061802. 10.1103/PhysRevLett.95.061802.
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Abstract
We report the first observation of the radiative hyperonic B decay B+ -> p Lambda gamma using a 140 fb(-1) data sample recorded on the Y(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. The measured branching fraction is B(B+ -> p Lambda gamma) 2:16 (+0.58)(-0:53) +/- 0:20) x 10(-6). We examine its Mp(Lambda) distribution and observe a peak near threshold. This feature is expected by the short-distance b -> s gamma transition. A search for B+ -> p Sigma(0)gamma yields no significant signal, and we set a 90% confidence level upper limit on the branching fraction of B(B+ -> p Sigma(0)gamma) < 4: 6 x 10(-6).
| Type: | Article |
|---|---|
| Title: | Observation of B+-> p(-)Lambda gamma |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.95.061802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.95.061802 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | BARYONIC B-DECAYS, SEARCH, PHYSICS |
| 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/1308481 |
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