Yang, HY;
Nakao, M;
Abe, K;
Abe, K;
Aihara, H;
Asano, Y;
Aushev, T;
... Zurcher, D; + view all
(2005)
Observation of B+-> K-1(1270)(+)gamma.
PHYS REV LETT
, 94
(11)
, Article 111802. 10.1103/PhysRevLett.94.111802.
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Abstract
We report the observation of the radiative decay B+-> K-1(1270)(+)gamma using a data sample of 140 fb(-1) taken at the Upsilon(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. We find the branching fraction to be B(B+-> K-1(1270)(+)gamma)=(4.3 +/- 0.9(stat.)+/- 0.9(syst.))x10(-5) with a significance of 7.3 sigma. We find no significant signal for B+-> K-1(1400)(+)gamma and set an upper limit B(B+-> K-1(1400)(+)gamma)< 1.5x10(-5) at the 90% confidence level. We also measure inclusive branching fractions for B+-> K(+)pi(+)pi(-)gamma and B-0-> K(0)pi(+)pi(-)gamma in the mass range 1 GeV/c(2)< M(K)(+(0))pi(+)pi(-)< 2 GeV/c(2).
| Type: | Article |
|---|---|
| Title: | Observation of B+-> K-1(1270)(+)gamma |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.94.111802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.111802 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | B DECAYS |
| 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-pp.ucl.ac.uk/id/eprint/1308459 |
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