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arXiv 0903.0256hep-ph
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B_s \to K^{(*)-}K^{(*)+},K^{(*)-}π^{+},K^{(*)-}ρ^{+}在R宇称破坏超对称中的衰变

B_s\to K^{(*)-}K^{(*)+}, K^{(*)-}π^{+}, K^{(*)-}ρ^{+} decays in R-parity violating supersymmetry

Yuan-Guo Xu, Ru-Min Wang, Ya-Dong Yang

摘要:

利用CDF合作对$B_s\to K^{-}K^{+}$、$K^{-}π^{+}$衰变的分支比和直接CP不对称性的首次测量,我们对R-宇称破坏的最小超对称标准模型的相关参数空间进行了约束.利用受约束的R-宇称破坏耦合,我们进一步研究了它们在$B_{s}\to K^{-*}π^{+}$,$K^{(*)-}ρ^{+}$和$K^{(*)\pm}K^{(*)\mp}$衰变中的可能影响。我们发现,一些分支比和CP不对称性是非常敏感的R-宇称违反耦合。树型过程$B_s\to K^{*-}ρ^{+}$的直接纵向CP不对称性可以扩大到$\sim 70%$,$B_s\to K^{*-}K^{*+}$的纵向极化和$K^{*-}ρ^{+}$衰变可以被夸克交换耦合抑制得很好.在不久的将来,CERN LHC的实验可以验证这些预测,并缩小/揭示RPV SUSY的参数空间。

英文摘要:

With the first measurements of the branching ratios and the direct CP asymmetries of $B_s\to K^{-}K^{+}$, $K^{-}π^{+}$ decays by the CDF collaboration, we constrain the relevant parameter space of the Minimal Supersymmetric Standard Model with R-parity violation. Using the constrained R-parity violating couplings, we further examine their possible effects in $B_{s}\to K^{-*}π^{+}$, $K^{(*)-}ρ^{+}$ and $K^{(*)\pm}K^{(*)\mp}$ decays. We find that some branching ratios and CP asymmetries are very sensitive to the R-parity violating couplings. The direct longitudinal CP asymmetries of tree-dominated process $B_s\to K^{*-}ρ^{+}$ could be enlarged to $\sim 70%$ and the longitudinal polarizations of $B_s\to K^{*-}K^{*+}$, $K^{*-}ρ^{+}$ decays could be suppressed very much by the squark exchange couplings. Near future experiments at CERN LHC can test these predictions and shrink/reveal the parameter spaces of RPV SUSY.

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