论文标题
LHC处轻度散射的全链四夸克的两光子衰变
Two-photon decay of fully-charmed tetraquarks from light-by-light scattering at the LHC
论文作者
论文摘要
LHC在7 GEV左右的新发现的共振结构（例如$ X（6900）$）可能是对观察到的5至10 GEV之间观察到的过量散射的原因。我们表明，确实可以通过$γγ$分支比例为$ 10^{ - 4} $的状态来解释用于逐光散射的地图集数据。这远大于媒介 - 梅森主导地位推断出的价值，但与三夸克对该状态性质的期望非常吻合。在LHC的正在进行的Run-3和未来的Run-4中获得的该区域中的进一步光线散射数据需要将这些状态固定在$γγ$通道中。
The LHC newly-discovered resonant structures around 7 GeV, such as the $X(6900)$, could be responsible for the observed excess in light-by-light scattering between 5 and 10 GeV. We show that the ATLAS data for light-by-light scattering may indeed be explained by such a state with the $γγ$ branching ratio of order of $10^{-4}$. This is much larger than the value inferred by the vector-meson dominance, but agrees quite well with the tetraquark expectation for the nature of this state. Further light-by-light scattering data in this region, obtained during the ongoing Run-3 and future Run-4 of the LHC, are required to pin down these states in $γγ$ channel.
