arXiv 2007.025042020-07hep-phhep-ex

${\bf B}_{bc}$重子弱强子衰变的$SU(3)$味对称性

$SU(3)$ Flavor Symmetry for Weak Hadronic Decays of ${\bf B}_{bc}$ Baryons

Junxing Pan, Yu-Kuo Hsiao, Jin Sun, Xiao-Gang He

备注：: 12 pages, 4 figures, 5 tables, version to be published in PRD
发表信息：: Phys. Rev. D 102, 056005 (2020)
DOI：: 10.1103/PhysRevD.102.056005

摘要：

有一个重c-夸克或一个重b-夸克和两个c-夸克的重子已经被发现。这些态是QCD所期望的，因此为理论提供了一个测试。应该有双美重子，还有一个有趣的可能性，重子${\bf B}_{bc}$有一个c夸克，一个b夸克。这些国家尚未被发现。从理论上对${\bf B}_{bc}$的质谱的理解来看，其主要衰变模式为弱衰变。这些衰变模式可以提供关于这些重子${\bf B}_{bc}$的重要信息。利用$SU(3)$味对称性分析了${\bf B}_{bc}$的两体强子弱衰变. $c$和$b$衰变中的任何一种都会诱导${\bf B}_{bc}$衰变。我们发现，Cabibbo允许衰变${\bf B}_{bc} \to {\bf B}_b + M$由于$c \to s u \bar d$可以是至关重要的勘探。大型强子对撞机可能具有发现这种衰变的灵敏度。其他由$b \to c q' \bar q$引起的${\bf B}_{bc}$衰变是次超前的。得到了几个可以用来检验$SU(3)$味对称性的分支比之间的关系。

英文摘要：

Baryons with a heavy c-quark or a heavy b-quark and also two c-quarks have been discovered. These states are expected in QCD and therefore provide a test for the theory. There should be double beauty baryons, and also an intriguing possibility that baryons ${\bf B}_{bc}$ with a c-quark, a b-quark. These states are yet to be discovered. The main decay modes of ${\bf B}_{bc}$ are expected to be weak processes from theoretical understanding of their mass spectrum. These decay modes can provide crucial information about these heavy baryons ${\bf B}_{bc}$. We analyze two body hadronic weak decays for ${\bf B}_{bc}$ using $SU(3)$ flavor symmetry. Any one of the $c$ and $b$ decays will induce ${\bf B}_{bc}$ to decay. We find that the Cabibbo allowed decays ${\bf B}_{bc} \to {\bf B}_b + M$ due to $c \to s u \bar d$ can be crucial for exploration. The LHC may have the sensitivity to discover such decays. Other ${\bf B}_{bc}$ decays due to $b \to c q' \bar q$ are sub-leading. Several relations among branching ratios are obtained which can be used to test $SU(3)$ flavor symmetry.

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。

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英文摘要：

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