arXiv 1608.048172016-08hep-phhep-ex

$\bar B\to D^{(*)} τ\bar ν$和$b\to s μ^+μ^-$中异常的R-奇偶破坏相互作用的后果

Consequences of R-Parity violating interactions for anomalies in $\bar B\to D^{(*)} τ\bar ν$ and $b\to s μ^+μ^-$

N. G. Deshpande, Xiao-Gang He

备注：: RevTex, 13 pages, three figures. In our earlier version, we had neglected a contribution to C^{NP}_9 and obtained erroneous conclusions which we have corrected them in this version
DOI：: 10.1140/epjc/s10052-017-4707-y

摘要：

在R宇称破坏（RPV）MSSM框架下，我们研究了$\bar B \to D^{(*)} τ\bar ν$的半轻子衰变增强、$b\to sμ^+μ^-$在$\bar B\to (K, K^*, ϕ)μ^+μ^-$中引起的反常以及$R_K = Br(\bar B\to K μ^+μ^-)/Br(\bar B\to K e^+e^-)$中轻子普适性破坏的可能性.下型右手夸克与夸克和轻子的交换产生了类似于leptoquark诱导相互作用的相互作用，这些相互作用被提出来同时用树级相互作用解释$\bar B \to D^{(*)} τ\bar ν$和用环诱导相互作用解释$b\to s μ^+μ^-$异常。然而，汤川耦合在这样的理论有严重的限制，从其他罕见的过程中$B$和$D$衰变。虽然这种相互作用可以提供一个可行的解决方案，$R(D^{(*)})$异常，我们表明，从$\bar B \to K ν\bar ν$的严格约束，这是不可能解决的异常$b\to s μ^+μ^-$过程中同时进行。

英文摘要：

We investigate the possibility of explaining the enhancement in semileptonic decays of $\bar B \to D^{(*)} τ\bar ν$, the anomalies induced by $b\to sμ^+μ^-$ in $\bar B\to (K, K^*, ϕ)μ^+μ^-$ and violation of lepton universality in $R_K = Br(\bar B\to K μ^+μ^-)/Br(\bar B\to K e^+e^-)$ within the framework of R-parity violating (RPV) MSSM. Exchange of down type right-handed squark coupled to quarks and leptons yield interactions which are similar to leptoquark induced interactions that have been proposed to explain the $\bar B \to D^{(*)} τ\bar ν$ by tree level interactions and $b\to s μ^+μ^-$ anomalies by loop induced interactions, simultaneously. However, the Yukawa couplings in such theories have severe constraints from other rare processes in $B$ and $D$ decays. Although this interaction can provide a viable solution to $R(D^{(*)})$ anomaly, we show that with the severe constraint from $\bar B \to K ν\bar ν$, it is impossible to solve the anomalies in $b\to s μ^+μ^-$ process simultaneously.

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