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arXiv 2108.07074hep-phhep-thnucl-exnucl-th
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全息魅力和底五夸克II:开衰变和隐衰变宽度

Holographic charm and bottom pentaquarks II: Open and hidden decay widths

Yizhuang Liu, Maciej A. Nowak, Ismail Zahed

摘要:

在重夸克极限下,我们分析了全息QCD预言的三种具有隐魅和底的$[\frac 12\frac 12^-]_{S=0,1}$和$[\frac 12\frac 32^-]_{S=1}$非奇异五夸克态的衰变模式。五夸克态是由束缚在瞬子核上的重-轻介子组成的。由于重夸克对称性,它们是简并的和稳定的。在次主导阶,自旋相互作用提升简并度并导致五夸克衰变。我们发现,开放的魅力(底部)衰变模式相形见绌的隐藏的魅力(底部)的,总宽度是一致的,最近报道的LHCb的魅力五夸克。给出了底五夸克态的预言。

英文摘要:

We analyze the decay modes of the three $[\frac 12\frac 12^-]_{S=0,1}$ and $[\frac 12\frac 32^-]_{S=1}$ non-strange pentaquarks with hidden charm and bottom, predicted by holographic QCD in the heavy quark limit. In leading order, the pentaquarks %are composed of heavy-light mesons in bulk bound to an instanton core. They are degenerate and stable by heavy quark symmetry. At next to leading order, the spin interactions lift the degeneracy and cause the pentaquarks to decay. We show that the open charm (bottom) decay modes dwarf the hidden charm (bottom) ones, with total widths that are consistent with those recently reported by LHCb for charm pentaquarks. Predictions for bottom pentaquarks are given.

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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