Chargino contributions to theCPasymmetry inB→φKSdecay

2003/06/09 by D. Chakraverty, Debrupa Chakraverty, E. Gabrielli +5 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.68.095004

published as Phys.Rev. D68 (2003) 095004 · 14 pages, LaTeX, 3.eps Figures

arxiv created 2003/06/09 · openalex publication_date 2003/11/21 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We perform a model independent analysis of the chargino contributions to the CP asymmetry in the \stackrel\ensuremath→B\ensuremathφK_S process. We use the mass insertion approximation method generalized by including the possibility of a light right stop. We find that the dominant effect is given by the contributions of the mass insertions (\ensuremathδ_LL^u)₃₂ and (\ensuremathδ_RL^u)₃₂ to the Wilson coefficient of the chromomagnetic operator. By considering both these contributions simultaneously, the CP asymmetry in the \stackrel\ensuremath→B\ensuremathφK_S process is significantly reduced, and negative values, which are within the 1\ensuremathσ experimental range and satisfy the \stackrel\ensuremath→bs\ensuremathγ constraints, can be obtained.

Citations

• QCD Factorization forB→ππDecays: Strong Phases andCPViolation in the Heavy Quark Limit
• QCD factorization for exclusive non-leptonic B-meson decays: general arguments and the case of heavy–light final states

Cited by

• B → X s γ, X s l + l − Decays and Constraints on Mass Insertion Parameters in MSSM