Direct CP violation, branching ratios and form factors B → π, B → K in B decays
| dc.contributor.author | Leitner, O. | |
| dc.contributor.author | Guo, X. | |
| dc.contributor.author | Thomas, A. | |
| dc.date.issued | 2005 | |
| dc.description.abstract | The B → π and B → K transitions involved in hadronic B decays are investigated in a phenomenological way through the framework of QCD factorization. By comparing our results with experimental branching ratios from the BELLE, BABAR and CLEO collaborations for all the B decays including either a pion or a kaon, we propose boundaries for the transition form factors B → π and B → K depending on the CKM matrix element parameters ρ and η. From this analysis, the form factors required to reproduce the experimental data for branching ratios are F<sup>B→π</sup> = 0.31±0.12 and F<sup>B→K</sup> = 0.37 ± 0.13. We calculate the direct CP violating asymmetry parameter, a<inf>CP</inf>, for B → π<sup>+</sup>π<sup>-</sup>π and B → π<sup>+</sup>π <sup>-</sup> K decays, in the case where ρ-ω mixing effects are taken into account. Based on these results, we find that the direct CP asymmetry for B<sup>-</sup> → π<sup>+</sup>π<sup>-</sup>π<sup>-</sup>, →B<sup>0</sup> → π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>, B<sup>-</sup> → π<sup>+</sup>π<sup>-</sup>K<sup>-</sup> and B̄<sup>0</sup> → π<sup>+</sup>π<sup>-</sup>K̄<sup>0</sup>, reaches its maximum when the invariant mass π<sup>+</sup>π<sup>-</sup> is in the vicinity of the ω meson mass. The inclusion of ρ-ω mixing provides an opportunity to erase, without ambiguity, the phase uncertainty mod(ω) in the determination of the CKM angles α in the case of b → u and γ in the case of b → s. © 2005 IOP Publishing Ltd. | |
| dc.description.statementofresponsibility | O. Leitner, X.-H. Guo and A.W. Thomas | |
| dc.identifier.citation | Journal of Physics G: Nuclear and Particle Physics, 2005; 31(3):199-253 | |
| dc.identifier.doi | 10.1088/0954-3899/31/3/004 | |
| dc.identifier.issn | 0954-3899 | |
| dc.identifier.issn | 1361-6471 | |
| dc.identifier.orcid | Thomas, A. [0000-0003-0026-499X] | |
| dc.identifier.uri | http://hdl.handle.net/2440/58123 | |
| dc.language.iso | en | |
| dc.publisher | IOP Publishing Ltd | |
| dc.rights | © IOP Publishing 2005.Submitted to Cornell University’s online archive www.arXiv.org in 2005 by Olivier Leitner.Post-print sourced from www.arxiv.org. | |
| dc.source.uri | http://arxiv.org/abs/hep-ph/0411392 | |
| dc.subject | High Energy Physics - Phenomenology (hep-ph) | |
| dc.title | Direct CP violation, branching ratios and form factors B → π, B → K in B decays | |
| dc.title.alternative | Direct CP violation, branching ratios and form factors B ---> PI, B ---> K in B decays | |
| dc.type | Journal article | |
| pubs.publication-status | Published |