论文标题
di- $ j/ψ$共振中旋转2颗粒的扰动QCD证据
Perturbative QCD Evidence for Spin-2 Particles in the Di-$J/ψ$ Resonances
论文作者
论文摘要
我们扩展了非依赖主义QCD框架，以探索新发现的di-$ j/ψ$共振的性质。假设它们是分子状状态或四夸克，我们计算了它们在LHC处的HustRrodulation横截面。我们发现观察到的共振很可能是旋转2颗粒，并且应该在这些共振附近存在Spin-0对应物。还提出了观察到的共振与潜在旋转0的生产横截面的比率，这可能有助于区分分子状状态与四夸克。
We extend the nonrelativistic QCD framework to explore the nature of the newly discovered di-$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.
