标题： 利用核碎裂产生的前向中子在超外围碰撞中切片庞加莱 显示英文标题

标题： Slicing Pomerons in ultraperipheral collisions using forward neutrons from nuclear breakup

摘要： 我们认为，在包含性高能光子-核 ($\gamma A$) 散射中，对核破裂产生的前向中子的测量提供了一种新颖的补充方法，用于研究重离子超外围碰撞 (UPCs) 中 QCD 的小-$x$动力学。 利用核遮蔽的领先扭近似，我们计算了在 LHC 中$\gamma Pb$碰撞中产生蒸发中子的数量分布。 我们证明，这使得能够确定受损核子的数量分布（非弹性碰撞），从而约束核子部分子分布的核遮蔽机制。 显示英文摘要

摘要： We argue that measurements of forward neutrons from nuclear breakup in inclusive high energy photon-nucleus ($\gamma A$) scattering provide a novel complementary way to study small-$x$ dynamics of QCD in heavy-ion ultraperipheral collisions (UPCs). Using the leading twist approximation to nuclear shadowing, we calculate the distribution over the number of evaporation neutrons produced in $\gamma Pb$ collisions at the LHC. We demonstrate that it allows one to determine the distribution over the number of wounded nucleons (inelastic collisions), which constrains the mechanism of nuclear shadowing of nuclear parton distributions.