Charming penguins strike back

2001/04/12 by M. Ciuchini, E. Franco, G. Martinelli +2 · 4 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0370-2693(01)00700-6

published as Phys.Lett.B515:33-41,2001 · 12 pages, 2 figures

arxiv created 2001/04/12 · openalex publication_date 2001/08/01 · arxiv updated 2010/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

By using the recent experimental measurements of B to pi pi and B to K pi branching ratios, we find that factorization is unable to reproduce the observed BRs even taking into account the uncertainties of the input parameters. Charming and GIM penguins allow to reconcile the theoretical predictions with the data. Because of these large effects, we conclude, however, that it is not possible, with the present theoretical and experimental accuracy, to determine the CP violation angle gamma from these decays. Contrary to factorization, we predict large asymmetries for several of the particle-antiparticle BRs, in particular BR(B⁺ to K⁺ pi⁰), BR(B_d to K⁺ pi^-) and BR(B_d to pi⁺ pi^-). This opens new perspectives for the study of CP violation in B systems.

Citations

• Gauge invariant and infrared finite theory of nonleptonic heavy meson decays
• CPViolatingBDecays in the Standard Model and Supersymmetry
• QCD Factorization forB→ππDecays: Strong Phases andCPViolation in the Heavy Quark Limit

Cited by

• Nonfactorizable contributions inBdecays to charmonium: The case ofB−→K−hc
• Factorization, effective field theory, and decays
• Charmless decaysB→ππ,πKandKKin broken SU(3) symmetry
• B→Kπ puzzle and new sources of CP violation in supersymmetry