Lin, SW;
Chang, P;
Abe, K;
Abe, K;
Adachi, I;
Aihara, H;
Anipko, D;
... Zupanc, A; + view all
(2007)
Measurements of branching fractions for b -> K pi and b ->pi pi decays.
PHYS REV LETT
, 99
(12)
, Article 121601. 10.1103/PhysRevLett.99.121601.
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Abstract
We report measurements of branching fractions for B -> K pi and B ->pi pi decays based on a data sample of 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We also measure the ratios of partial widths for B -> K pi decays, namely R-c equivalent to 2 Gamma(B+-> K+pi(0))/Gamma(B+-> K-0 pi(+))=1.08 +/- 0.06 +/- 0.08 and R-n equivalent to Gamma(B-0 -> K+pi(-))/2 Gamma(B-0 -> K-0 pi(0))=1.08 +/- 0.08 +/- 0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations.
| Type: | Article |
|---|---|
| Title: | Measurements of branching fractions for b -> K pi and b ->pi pi decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.99.121601 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.99.121601 |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| Keywords: | PHOTOS MONTE-CARLO, PI-K, 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/1308564 |
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