arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1910.03318hep-ph
收藏

将观测到的$Λ_b(6146)^0$和$Λ_b(6152)^0$态解释为1个$D$底重子

Interpretation of the observed $Λ_b(6146)^0$ and $Λ_b(6152)^0$ states as 1$D$ bottom baryons

Bing Chen, Si-Qiang Luo, Xiang Liu, Takayuki Matsuki

摘要:

测得的质量和强衰变的$Λ_b(6146)^0$和$Λ_b(6152)^0$要求我们解码为1 $D$激发态与$J^P=3/2^+$和$J^P=5/2^+$,分别。在建议的分配下,可以解释$Λ_b(6146)^0$和$Λ_b(6152)^0$的质量和总衰变宽度。作为$J^P=3/2^+$状态,$Λ_b(6146)^0$应主要衰变为$Σ_b(5815)π$。然而,该理论结果与测量相矛盾,因为LHCb没有观察到显著的$Λ_b(6146)^0\rightarrowΣ_b(5815)^\pmπ^\mp$信号。对这一困难的可能解释被提及。为了完整起见,我们在这项工作中提出了其他看不见的1 $D$底重子的质量和衰变宽度的预测。我们的研究结果可以为即将进行的实验提供一些重要的线索。

英文摘要:

The measured masses and strong decays of $Λ_b(6146)^0$ and $Λ_b(6152)^0$ required us to decode them as the 1$D$ excited states with $J^P=3/2^+$ and $J^P=5/2^+$, respectively. Under the suggested assignment, the masses and total decay widths of $Λ_b(6146)^0$ and $Λ_b(6152)^0$ can be explained. As a $J^P=3/2^+$ state, the $Λ_b(6146)^0$ should mainly decay into $Σ_b(5815)π$. However, this theoretical result is in contradiction to the measurement since no significant $Λ_b(6146)^0\rightarrowΣ_b(5815)^\pmπ^\mp$ signals were observed by the LHCb. The possible explanations to this difficulty are mentioned. For completeness, we present the prediction of masses and decay widths of other unseen 1$D$ bottom baryons in this work. Our results could provide some important clues for the upcoming experiments.

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。

↑