2004/09/30 by Yue-Liang Wu, Yu-Feng Zhou · 5 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.71.021701
published as Phys.Rev.D71:021701,2005 · 4 pages, 1 figure, 1 table, results updated with the latest data. conclusions unchanged. Refence added. published version
openalex publication_date 2005/01/20 · arxiv created 2005/01/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Based on the most recent data in charmless B decays including the very recently reported large direct CP violations, it is shown that the weak phase \ensuremathγ can well be extracted without twofold ambiguity even only from two decay modes \ensuremathπ+\ensuremathπ^\ensuremath- and \ensuremathπ+K^\ensuremath-, and its value is remarkably consistent with the global standard model fit at a compatible accuracy. A fit to all the \ensuremathπ\ensuremathπ,\ensuremathπK data favor both large electroweak penguin and color-suppressed tree amplitude with large strong phases. It is demonstrated that the inclusion of SU(3) symmetry breaking effects of strong phases and the inelastic rescattering effects can well improve the consistency of the data, while both effects may not be sufficient to arrive at a small electroweak penguin amplitude in the standard model. It is of interest to notice that large or small electroweak penguin amplitude becomes a testable prediction as they lead to significantly different predictions for the direct CP violations for \ensuremathπ0\ensuremathπ0, \ensuremathπ0K0 modes. Clearly, precise measurements on charmless B decays will provide a window for probing new physics.