论文标题
重新访问$ r $ r $ parity违反MSSM的$ B $ - 物理异常
Revisiting the $B$-physics anomalies in $R$-parity violating MSSM
论文作者
论文摘要
近年来，在$ b $ -Meson的半衰减衰减中的标准模型预测有几个偏差可能表明，新物理学的存在可能会破坏Lepton-Favour普遍存在。在这项工作中，我们探讨了使用Muon Sneutrinos和右撇子Sbottoms同时以$ R $ $ PARITY违反最小超对称标准模型同时解决这些$ b $ physysics异常的可能性。我们发现，由于第一次存在对数增强，通过交换Sneutrino引起的光子企鹅可以提供相当大的Lepton风味。这提示我们使用两参数方案$（c^{\ rm V} _9，\，c^{\ rm u} _9）$来解释$ b \ to s \ ell^+ ell^+ el^+ ell^ell^ - $ anomaly。最后，数值分析表明，Muon Sneutrinos和右手可以解释$ b \向S \ Ell^+ \ ell^ - $ and $ r（d^{（\ ast）}）$ anomalies $同时满足其他相关过程的约束，例如$ b_s- \ bar b_s $混合，$ z $衰减，以及$ d^0 \toμ^+μ^ - $，$τ\ toμρ^0 $，$ b \ toτν$，$ d_s \ toτν$，$ d_s \ toτν$，$τ\ to k n
In recent years, several deviations from the Standard Model predictions in semileptonic decays of $B$-meson might suggest the existence of new physics which would break the lepton-flavour universality. In this work, we have explored the possibility of using muon sneutrinos and right-handed sbottoms to solve these $B$-physics anomalies simultaneously in $R$-parity violating minimal supersymmetric standard model. We find that the photonic penguin induced by exchanging sneutrino can provide sizable lepton flavour universal contribution due to the existence of logarithmic enhancement for the first time. This prompts us to use the two-parameter scenario $(C^{\rm V}_9, \, C^{\rm U}_9)$ to explain $b \to s \ell^+ \ell^-$ anomaly. Finally, the numerical analyses show that the muon sneutrinos and right-handed sbottoms can explain $b \to s \ell^+ \ell^-$ and $R(D^{(\ast)})$ anomalies simultaneously, and satisfy the constraints of other related processes, such as $B \to K^{(\ast)} ν\barν$ decays, $B_s-\bar B_s$ mixing, $Z$ decays, as well as $D^0 \to μ^+ μ^-$, $τ\to μρ^0$, $B \to τν$, $D_s \to τν$, $τ\to K ν$, $τ\to μγ$, and $τ\to μμμ$ decays.
