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arXiv 2009.08376hep-phhep-ex
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双$J/\psi$共振态中自旋2粒子的微扰QCD证据

Perturbative QCD Evidence for Spin-2 Particles in the Di-$J/ψ$ Resonances

Hong-Fei Zhang, Yan-Qing Ma, Wen-Long Sang

AI总结:

本研究拓展非相对论QCD框架,探究新发现的双$J/\psi$共振态本质,通过计算LHC上的强产生截面,推测其大概率为自旋2粒子且存在自旋0伙伴态,给出的截面比可辅助区分类分子态与四夸克态。

摘要:

我们拓展了非相对论QCD框架,以探究新发现的双$J/\psi$共振态的本质。假设它们要么是类分子态要么是四夸克态,我们计算了其在LHC(大型强子对撞机)上的强产生截面。我们发现观测到的共振态极有可能是自旋2粒子,且在这些共振态附近应存在对应的自旋0伙伴态。本文还给出了观测到的共振态与潜在自旋0态的产生截面比值,这或有助于区分类分子态与四夸克态。

英文摘要:

We extend the nonrelativistic QCD framework to explore the nature of the newly discovered di-$J/ψ$ resonances. Assuming them as either molecule-like states or tetraquarks, we calculated their hadroproduction cross sections at the LHC. We find that the observed resonances are most likely spin-2 particles, and there should exist their spin-0 counterparts near these resonances. The ratio of production cross sections of the observed resonances to the latent spin-0 ones are also presented, which might help to distinguish molecule-like states from tetraquarks.

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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