Mohapatra, D;
Nakao, M;
Nishida, S;
Abe, K;
Abe, K;
Adachi, I;
Aihara, H;
... Belle Collaborat; + view all
(2006)
Observation of b -> d gamma and determination of vertical bar V-td/V-ts vertical bar.
PHYS REV LETT
, 96
(22)
, Article 221601. 10.1103/PhysRevLett.96.221601.
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Abstract
We report the observation of the flavor-changing neutral current process b -> d gamma using a sample of 386 x 10(6) B meson pairs accumulated by the Belle detector at the KEKB e(+)e(-) collider. We measure branching fractions for the exclusive modes B- -> rho(-)gamma, (B) over bar (0) -> rho(0)gamma, and (B) over bar (0) -> omega gamma. Assuming that these three modes are related by isospin, we find B((B) over bar -> (rho, omega)gamma) = (1.32(-0.31)(+0.34)(stat)(-0.09)(+0.10)(syst)) x 10(-6) with a significance of 5.1 sigma. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements vertical bar V-td/V-ts vertical bar to be 0.199(-0.025)(+0.026)(exp)(-0.015)(+0.018)(theor).
| Type: | Article |
|---|---|
| Title: | Observation of b -> d gamma and determination of vertical bar V-td/V-ts vertical bar |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.96.221601 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.96.221601 |
| Language: | English |
| Additional information: | © 2006 The American Physical Society |
| Keywords: | TO-LEADING ORDER, QCD SUM-RULE, BRANCHING RATIOS, RADIATIVE DECAYS, CP-VIOLATION, BELLE, MODEL |
| 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/1308506 |
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