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Title: | Branching Fractions and CP Asymmetries in B0→π0π0, B+→π+π0, and B+→K+π0 Decays and Isospin Analysis of the B→ππ System |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 12-May-2005 |
Publisher: | American Physical Society |
Abstract: | Based on a sample of 227 × 10 6 B ¯¯¯ B pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B ( B 0 → π 0 π 0 ) = ( 1.17 ± 0.32 ± 0.10 ) × 10 − 6 , and the asymmetry C π 0 π 0 = − 0.12 ± 0.56 ± 0.06 . The B 0 → π 0 π 0 signal has a significance of 5.0 σ . We also measure B ( B + → π + π 0 ) = ( 5.8 ± 0.6 ± 0.4 ) × 10 − 6 , B ( B + → K + π 0 ) = ( 12.0 ± 0.7 ± 0.6 ) × 10 − 6 , and the charge asymmetries A π + π 0 = − 0.01 ± 0.10 ± 0.02 and A K + π 0 = 0.06 ± 0.06 ± 0.01 . Using isospin relations, we find an upper bound on the angle difference | α − α eff | of 35° at the 90% C.L. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.94.181802 |
It is part of: | Physical Review Letters, 2005, vol. 94, num. 18, p. 181802 |
URI: | http://hdl.handle.net/2445/140514 |
Related resource: | https://doi.org/10.1103/PhysRevLett.94.181802 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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