论文标题
$ρ^{0} $ vector Mesons的连贯光生效在$ \ sqrt {s _ {\ rm nn}} = 5.02 $ tev
Coherent photoproduction of $ρ^{0}$ vector mesons in ultra-peripheral Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV
论文作者
论文摘要
报告了$ρ^{0} $ vector Mesons在$ \ sqrt {s _ {\ mathrm {nn}}} = 5.02 $ tev中相干的光增生。依赖于$π^+π^ - $衰减通道的测量值在涵盖范围$ | y | <0.8 $的三个速度区域中呈现。对于每个速度间隔，根据在零度热量表中测得的中子的存在，为不同的核破裂类别显示了横截面。将结果与基于不同模型的核阴影模型进行比较。最后，据报道，观察出相干产生的类似共振的结构，质量约为1.7 GEV/$ C^2 $，宽度约为140 meV/$ c^2 $，并与其他实验的类似观察结果进行了比较。
Cross sections for the coherent photoproduction of $ρ^{0}$ vector mesons in ultra-peripheral Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}}= 5.02$ TeV are reported. The measurements, which rely on the $π^+π^-$ decay channel, are presented in three regions of rapidity covering the range $|y|<0.8$. For each rapidity interval, cross sections are shown for different nuclear-breakup classes defined according to the presence of neutrons measured in the zero-degree calorimeters. The results are compared with predictions based on different models of nuclear shadowing. Finally, the observation of a coherently produced resonance-like structure with a mass around 1.7 GeV/$c^2$ and a width of about 140 MeV/$c^2$ is reported and compared with similar observations from other experiments.
