arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 2402.02703hep-ph
收藏

$B^0 \ ightarrow \ar{D}^0 p \ar{p}$衰变中开粲五夸克分子态的产生

Production of open-charm pentaquark molecules in decay $B^0 \rightarrow \bar{D}^0 p \bar{p}$

Shu-Yi Kong, Jun-Tao Zhu, Shu Chen, Jun He

备注：
11 pages, 6 figures, published version
发表信息：
Phys.Rev.D 110 (2024) 9, 094042
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

AI总结：

本研究通过准势Bethe-Salpeter方程方法分析$B^0 \ ightarrow \ar{D}^0 p \ar{p}$衰变中的不变质量谱，探究开粲五夸克分子态的产生，识别出潜在的$Λ_c(2940)$反粒子伙伴，指出该衰变适合部分开粲分子态探测，呼吁开展更精确实验测量。

摘要：

本研究探究了开粲五夸克分子态（具体为$N\ar{D}^*$和$\ar{N}\ar{D}^*$）在$B^0 \ ightarrow \ar{D}^0 p \ar{p}$衰变中的产生情况。我们通过准势Bethe-Salpeter方程方法纳入再散射过程，分析了$p\ar{D}^0$和$\ar{p}\ar{D}^0$的不变质量谱。研究结果表明，在$\ar{p}\ar{D}^0$质量谱中，自旋宇称为$3/2^+$的同位旋标量$\ar{N}\ar{D}^*$分子态有可能被识别为$Λ_c(2940)$的反粒子伙伴。尽管在$\ar{N}\ar{D}$阈值附近存在自旋宇称为$1/2^-$的分子态，但其信号很弱，说明$B^0 \ ightarrow \ar{D}^0 p \ar{p}$衰变可能并非探测该态的理想过程。自旋宇称为$1/2^-$的同位旋矢量$N\ar{D}^*$分子态的清晰信号可能出现在$p\ar{D}^0$不变质量谱中，而$3/2^-$态的信号仍然非常微弱。我们强调底介子的三体衰变是研究开粲分子态的一种有价值的方法，并呼吁对$B^0 \ ightarrow \ar{D}^0 p \ar{p}$衰变给予更多关注并开展更精确的实验测量。

英文摘要：

This study investigates the production of open-charm pentaquark molecular states, specifically $N\bar{D}^*$ and $\bar{N}\bar{D}^*$, within the $B^0 \rightarrow \bar{D}^0 p \bar{p}$ decay. We examine the invariant mass spectra of $p\bar{D}^0$ and $\bar{p}\bar{D}^0$, incorporating the rescattering process through a quasipotential Bethe-Salpeter equation approach. Our findings suggest the possible identification of the isoscalar $\bar{N}\bar{D}^*$ molecule with $3/2^+$ as the antiparticle partner of $Λ_c(2940)$ in the $\bar{p}\bar{D}^0$ mass spectrum. Although a molecular state near the $\bar{N}\bar{D}$ threshold with $1/2^-$ exists, its signal is weak, indicating that the $B^0 \rightarrow \bar{D}^0 p \bar{p}$ decay may not be ideal for its detection. A distinct signal of the isovector $N\bar{D}^*$ molecule with $1/2^-$ may appear in the $p\bar{D}^0$ invariant mass spectrum, while the signal for the $3/2^-$ state remains very weak. We emphasize the importance of the three-body decay of the bottom meson as a valuable method for studying open-charm molecules and advocate for increased attention and more precise experimental measurements of the $B^0 \rightarrow \bar{D}^0 p \bar{p}$ decay.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑