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Chargino contributions to the CP asymmetry in B -> Phi K(S) decay

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arxiv hep-ph/0306076 v1 pith:KZNILKBJ submitted 2003-06-09 hep-ph

Chargino contributions to the CP asymmetry in B -> Phi K(S) decay

classification hep-ph
keywords contributionsasymmetrycharginodeltaumassprocessanalysisapproximation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We perform a model independent analysis of the chargino contributions to the CP asymmetry in B -> Phi K(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 deltaU_LL(32) and deltaU_RL(32) to the Wilson coefficient of the chromomagnetic operator. By considering both these contributions simultaneously, the CP asymmetry in B -> Phi K(S) process is significantly reduced and negative values, which are within the 1-sigma experimental range and satisfy the b -> s gamma constraints, can be obtained.

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