2006/11/30 by W.-S. Hou, Wei-Shu Hou, Hsiang-nan Li +2
Physics and Astronomy · #Amplitude #B meson #CP violation #Electroweak interaction #Formalism (music) #High-Energy Particle Collisions Research #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #hep-ph
paper · pdf · doi:10.1103/physrevlett.98.131801
published as Phys.Rev.Lett.98:131801,2007 · 4 pages, 6 figures; version to appear in Phys. Rev. Lett
openalex publication_date 2007/03/26 · arxiv created 2007/03/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the effect from a sequential fourth generation quark on penguin-dominated two-body nonleptonic B meson decays in the next-to-leading order perturbative QCD formalism. With an enhancement of the color-suppressed tree amplitude and possibility of a new CP phase in the electroweak penguin amplitude, we can account better for ACP(B0\ensuremath→K+\ensuremathπ^\ensuremath-)\ensuremath-ACP(B+\ensuremath→K+\ensuremathπ0). Taking |V_t^\ensuremath'sV_t^\ensuremath'b|\ensuremath∼0.02 with a phase just below 90\ifmmode^∘\else\textdegree\fi, which is consistent with the b\ensuremath→s\ensuremathℓ+\ensuremathℓ^\ensuremath- rate and the Bs mixing parameter \ensuremathΔm_Bs, we find a downward shift in the mixing-induced CP asymmetries of B0\ensuremath→KS\ensuremathπ0 and \ensuremathφKS. The predicted behavior for B0\ensuremath→\ensuremathρ0KS is opposite.