New constraints on nuclear parton distribution functions at small x from dijet production in photon-nucleus collisions at the LHC

本项目的主要目标是预测大型强子对撞机（LHC）第二次运行核-核和质子-核超周边碰撞中次领先阶微扰QCD的双喷光生截面，研究该截面对核部分子分布函数中核遮蔽的小x效应的敏感性，并定量分析了利用这一过程获得小x核部分子分布函数新约束的可能性。此外，本文还比较了光子-核散射和质子-核散射中双喷流产生在限制小x核部分子分布函数方面的相对优点，并对未来电子离子对撞机（EIC）或大型强子电子对撞机（LHeC）中轻子-核散射中的双喷流光生进行了预测。

The main objectives of the proposed project are predictions for the cross section of dijet photoproduction in nucleus-nucleus and proton-nucleus ultraperipheral collisions at Run 2 of the Large Hadron Collider (LHC) at next-to-leading order of perturbative QCD, studies of the sensitivity of this cross section to the small-x effects of nuclear shadowing in nuclear parton distribution functions, and a quantitative analysis of the possibility to obtain new constraints on small-x nuclear parton distribution functions using this process. In addition, the relative merits of dijet production in photon-nucleus and proton-nucleus scattering for constraining small-x nuclear parton distribution functions will be compared, and predictions for dijet photoproduction in lepton-nucleus scattering at a future Electron Ion Collider (EIC) or Large Hadron electron Collider (LHeC) will be made.