arXiv 1912.033692019-12-06hep-phnucl-th

在$B$衰变中产生（预测的）$K^*(4307)$

Production of the (predicted) $K^*(4307)$ in $B$ decays

Xiu-Lei Ren, K. P. Khemchandani, A. Martinez Torres

发表信息：: Phys. Rev. D 102, 016005 (2020)
DOI：: 10.1103/PhysRevD.102.016005

摘要：

在这项工作中，我们研究的生产$K^*(4307)$在$B$衰变通过确定$J/ψπ^{+(0)}K^{0}$和$J/ψπ^- K^+$不变的质量分布的过程$B^+\to J/ψπ^+π^0 K^0$和$B^+\to J/ψπ^+π^- K^+$，分别。这种$K^*(4307)$最近被预测为源自$K D\bar D^*$系统中所涉及的动力学的三体状态，其中$KD$子系统形成处于同位旋0的$D^{*}_{s0}(2317)$，并且$D\bar D^*$子系统产生处于同位旋0的$X(3872)$和处于同位旋1的$Z_c(3900)$。$K^*(4307)$的隐藏魅力内容有利于它衰变到像$J/ψπK$这样的状态，并且对$B$ -衰变的研究可以构成一种寻找这种奇异矢量介子的实验证据的方法，尽管它的质量很大，但它的宽度仍然很窄（大约18 MeV）。

英文摘要：

In this work we study the production of $K^*(4307)$ in $B$ decays by determining the $J/ψπ^{+(0)}K^{0}$ and $J/ψπ^- K^+$ invariant mass distributions of the processes $B^+\to J/ψπ^+π^0 K^0$ and $B^+\to J/ψπ^+π^- K^+$, respectively. Such $K^*(4307)$ has been recently predicted as a three-body state originated from the dynamics involved in the $K D\bar D^*$ system, with the $KD$ subsystem forming the $D^{*}_{s0}(2317)$ in isospin 0, and the $D\bar D^*$ subsystem generating the $X(3872)$ in isospin 0 and the $Z_c(3900)$ in isospin 1. The hidden charm content of $K^*(4307)$ favors its decay to a state like $J/ψπK$ and the study of $B$-decays with these particles in their final states can constitute a way of finding experimental evidences for such an exotic vector meson, whose width, in spite of its large mass, is still quite narrow (around 18 MeV).

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摘要：

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