New physics effects on theCPasymmetries inB→φKSandB→η′KSdecays

2003/06/05 by A. Giri, Anjan K. Giri, Rukmani Mohanta · 2 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.68.014020

published as Phys.Rev. D68 (2003) 014020 · LaTex, 21 pages, 7 figures, to appear in Phys. Rev. D

arxiv created 2003/06/05 · openalex publication_date 2003/07/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Within the standard model (SM), the time-dependent CP asymmetries in \stackrel\ensuremath→B\ensuremathψK_S, \stackrel\ensuremath→B\ensuremathη^\ensuremath'K_S, and \stackrel\ensuremath→B\ensuremathφK_S are expected to give the same result, i.e., sin2\ensuremathβ. However, recent measurements of the mixing-induced CP asymmetries in \stackrel\ensuremath→B\ensuremathφK_S and \stackrel\ensuremath→B\ensuremathη^\ensuremath'K_S modes give results whose central values differ from the SM expectations. We explore the effect of new physics in the two Higgs doublet model (THDM), which allows tree level flavor changing neutral currents (so-called model III), and the model with an extra vectorlike down quark (VLDQ). We find that the observed mixing-induced CP asymmetry for \stackrel\ensuremath→B\ensuremathφK_S cannot be accommodated by the THDM but can be explained in the VLDQ model, and both models can explain the observed asymmetry for \stackrel\ensuremath→B\ensuremathη^\ensuremath'K_S mode.

Citations

• Measurements ofCP-Violating Asymmetries and Branching Fractions inBMeson Decays toη′K
• Effects of Superheavy Quarks and Leptons in Low-Energy Weak Processes KL-> Formula, K+-> + Formula and K0 Formula0
• CP-Violation in the Renormalizable Theory of Weak Interaction

Cited by

• Signature of new physics in B→ϕπ decay
• Implications of the nonuniversalZboson in flavor changing neutral current mediated rare decays