Revisiting B_s\toμ^+μ^- and B\to K^{(*)}μ^+μ^- decays in the MSSM with and without R-parity

Details Revisiting B_s\toμ^+μ^- and B\to K^{(*)}μ^+μ^- decays in the MSSM with and without R-parity Revisiting B_s\toμ^+μ^- and B\to K^{(*)}μ^+μ^- decays in the MSSM with and without R-parity

2011-12-14

arxiv.org/abs/1112.3174v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 9 figures

Scientific paper

The rare decays B_s->\mu^+\mu^- and B->K(*)\mu^+\mu^- are sensitive to new particles and couplings via their interferences with the standard model contributions. Recently, the upper bound on B(B_s->\mu^+\mu^-) has been improved significantly by the CMS, LHCb, CDF and DO experiments. Combining with the measurements of B(B->K(*)\mu^+\mu^-), we derive constraints on the relevant parameters of minimal supersymmetic standard model with and without R-parity, and examine their contributions to the dimuon forward-bachward asymmetry in B-> K*\mu^+\mu^- decay. We find that: (i) the contribution of R-parity violating coupling products \lambda'_{2i2}\lambda'*_{2i3} due to squark exchange is comparable with the theoretical uncertainties in B->K\mu^+\mu^- decays, but still could be significant in B->K*\mu^+\mu^- decay and could account for the forward-bachward asymmetry in the low dimuon invariant mass region; (ii) three constrained mass insertions (\delta^u_{LL})_{23}, (\delta^d_{LL})_{23} and (\delta^d_{RR})_{23} could have significant contribution to dA_{FB}(B->K*\mu^+\mu^-)/ds, however, only the constrained (\delta^u_{LL})_{23} effects are favored by the results of the Belle and CDF experiments.

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