Chargino contributions to the CP asymmetry in B -> Phi K(S) decay
High Energy Physics - Phenomenology
2009-11-10 v1
Abstract
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.
Cite
@article{arxiv.hep-ph/0306076,
title = {Chargino contributions to the CP asymmetry in B -> Phi K(S) decay},
author = {D. Chakraverty and E. Gabrielli and K. Huitu and S. Khalil},
journal= {arXiv preprint arXiv:hep-ph/0306076},
year = {2009}
}
Comments
14 pages, LaTeX, 3.eps Figures