首页> 外文期刊>Nuclear physics, B >Probing the R-parity violating supersymmetric effects in B c J / ψ ? ? ν ˉ ? , η c ? ? ν ˉ ? and Λ b Λ c ? ? ν ˉ ? decays
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Probing the R-parity violating supersymmetric effects in B c J / ψ ? ? ν ˉ ? , η c ? ? ν ˉ ? and Λ b Λ c ? ? ν ˉ ? decays

机译: B c J / < / mml:mo> ψ < mml:mi>ν ˉ η c < / mml:msub> ν ˉ 和< mml:math xmlns:mml =“ http://www.w3.org/1998/Math/MathML” altimg =“ si10.gif” display =“ inline” overflow =“ scroll”> Λ b Λ c ?< / mml:mi> ν ˉ< / mml:mo> 衰减

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Motivated by recent R D , R D ? and R J / ψ anomalies in B → D ? ? ν ˉ ? , B → D ? ? ? ν ˉ ? and B c → J / ψ ? ? ν ˉ ? decays, respectively, we study possible R-parity violating supersymmetric effects in B c → J / ψ ? ? ν ˉ ? , η c ? ? ν ˉ ? and Λ b → Λ c ? ? ν ˉ ? decays, which are also induced by b → c ? ? ν ˉ ? at quark level. We find that (I) the constrained slepton exchange couplings λ i 33 λ ? i 23 ′ ? involving in b → c τ ? ν ˉ τ transition from relevant latest experimental data still have quite large effects on all (differential) branching ratios and the normalized forward–backward asymmetries of the exclusive semileptonic b → c τ ? ν ˉ τ decays as well as the ratios of the (differential) branching ratios; (II) after satisfying the data of R D and R D ? , the upper limit of R J / ψ , R η c and R Λ c could be increased by 10%, 112% and 24%, respectively, from their upper limits of the Standard Model predictions by the λ i 33 λ ? ′ ? i 23 couplings. The results in this work could be used to probe R-parity violating effects and will correlate with searches for direct supersymmetric signals at the running LHCb and the forthcoming Belle-II.
机译:受最近的R D激励,R D? B→D中的R和R J /ψ异常? ? νˉ? ,B→D? ? ? νˉ?和B c→J /ψ? ? νˉ?分别衰减,我们研究在B c→J /ψ?中可能违反R奇偶性的超对称效应。 ? νˉ? ,ηc? ? νˉ?和Λb→Λc? ? νˉ?衰变,也由b→c引起。 ? νˉ?在夸克级别。我们发现(I)受约束的子链交换耦合λi 33λ?我23'涉及b→cτ?从最新的相关实验数据得到的νττ转移对所有(差分)分支比和排他的半轻子b→cτ的归一化前后对称性仍具有相当大的影响。 νττ衰变以及(微分)分支比的比率; (II)在满足R D和R D的数据之后? ,R j /ψ,Rηc和RΛc的上限可以比标准模型预测的上限分别增加λi 33λ?10%,112%和24%。 '? i 23个联轴器。这项工作的结果可用于探测违反R奇偶性的效应,并将与在运行的LHCb和即将到来的Belle-II处寻找直接超对称信号相关。

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