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 2005.12424hep-ph
收藏

激发$Ω_b$信号的解释

Interpretation of excited $Ω_b$ signals

Marek Karliner, Jonathan L. Rosner

摘要:

最近LHCb报道发现了四个极窄的激发态$Ω_b$重子衰变为$Ξ_b^0 K^-$。我们将这些重子解释为一个$b$ -夸克和一个$P$ -波$ss$ -双夸克的束缚态.对于这样一个系统,自旋和轨道角动量有五种可能的组合。我们预测两个自旋为1/2,两个自旋为3/2,一个自旋为5/2,都是负宇称。我们倾向于将观测到的态确定为自旋为1/2和3/2的态,并给出了自旋为5/2的态的预测质量范围。我们更新这些国家的基础上,五个窄激发$Ω_c$国家LHCb报告的早期预测。另一种图片的状态,其中之一的$J=1/2$是非常广泛的,因此没有看到LHCb进行了讨论。

英文摘要:

Recently LHCb reported the discovery of four extremely narrow excited $Ω_b$ baryons decaying into $Ξ_b^0 K^-$. We interpret these baryons as bound states of a $b$-quark and a $P$-wave $ss$-diquark. For such a system there are exactly five possible combinations of spin and orbital angular momentum. We predict two of spin 1/2, two of spin 3/2, and one of spin 5/2, all with negative parity. We favor identifying the observed states as those those with spins 1/2 and 3/2, and give a range of predicted masses for the one with spin 5/2. We update earlier predictions for these states based on the five narrow excited $Ω_c$ states reported by LHCb. An alternative picture of the states in which one of $J=1/2$ is extremely wide and hence not seen by LHCb is discussed.

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。

↑