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Probing the Neutron-Skin Thickness Through J/ψPhotoproduction in Ultra-Peripheral Collisions 认领 引用
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作者 Haoyuan Li Lu-Meng Liu +2 位作者 Jinhui Chen Yu-Gang Ma Chunjian Zhang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期1-8,共8页
We study the impact of neutron-skin thickness on J/ψphotoproduction in ultra-peripheral208Pb+208Pb collisions.Within the color glass condensate framework,we calculate coherent and incoherent cross sections and ... We study the impact of neutron-skin thickness on J/ψphotoproduction in ultra-peripheral208Pb+208Pb collisions.Within the color glass condensate framework,we calculate coherent and incoherent cross sections and examine their dependence on the momentum transfer|t|for different neutron-skin thicknesses.We find a clear imprint of the neutron skin on the|t|spectra:a larger neutron skin leads to a smoother and more extended colordensity profile,suppressing the coherent cross section at large|t|while enhancing the incoherent cross section through increased event-by-event configurational fluctuations in the nuclear periphery.We further show that the ratio of incoherent to coherent integrated cross sections provides a particularly sensitive and robust observable,with reduced theoretical uncertainties.These results establish diffractive vector-meson photoproduction in ultraperipheral collisions as a powerful tomographic tool to constrain the neutron-skin thickness and the transverse gluon distribution at the LHC and future electronśion colliders. 展开更多
关键词 color glass condensate frameworkwe coherent incoherent cross sections j photoproduction coherent cross section ultra peripheral collisions color glass condensate neutron skin thickness colordensity profilesuppressing
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