1973/01/01 by W.-S. Hou, Wei-Shu Hou, Makiko Nagashima +2 · 3 citations
Physics and Astronomy · Social Sciences · #Collaborative Teaching and Inclusion #Educational Practices and Policies #Neutrino Physics Research #Parental Involvement in Education #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevlett.95.141601
published as Phys.Rev.Lett. 95 (2005) 141601 · Text reorganized, including adding discussion of DCPV in b -> s gamma, to appear in Phys. Rev. Lett
openalex publication_date 1973/01/01 · arxiv created 2005/08/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
Direct CP violation in B0 --> K+ pi- decay has emerged at the -10% level, but the asymmetry in B+ --> K+ pi0 mode is consistent with zero. This difference points towards possible new physics in the electroweak penguin operator. We point out that a sequential fourth generation, with sizable V(t' s)* V(t' b) and near maximal phase, could be a natural cause. We use the perturbative QCD factorization approach for B --> Kpi amplitudes. While the B0 --> K+ pi- mode is insensitive to t', we critically compare t' effects on direct CP violation in B+ --> K+ pi0 with b --> sl+ l- and B(s) mixing. If the K+ pi0 - K+ pi- asymmetry difference persists, we predict sin2phi(Bs) to be negative.