论文标题
超长核冲突是重夸克尼亚的来源
Ultra-peripheral nuclear collisions as a source of heavy quarkonia
论文作者
论文摘要
QCD偶极性形式主义中描述了超长核冲突（UPC）中大量的Quarkonium产生。 $ q \ bar q $ ret框架中现实的Quarkonium波函数是通过求解Schrödinger方程来以随后的Lorentz提升到高能量来计算的。我们依靠几个现实的$ q \ bar q $电势，可以很好地描述Quarkonium块和衰减宽度，以及质子上Quarkonia衍射电源的数据。核效应是通过拟合到数据的现象学偶极横截面来计算的。包括光子的最低$ Q \ b Q $ fock组件以及与含有较高胶结的较高组件有关的领先的扭曲gluon阴影相关的较高扭曲夸克阴影。重型核UPC中夏因尼和底部的相干和不相互光生促生生成的结果与LHC的可用数据相符。也可以在电子离子山着物的将来的实验中进行验证。
Heavy quarkonium production in ultra-peripheral nuclear collisions (UPC) is described within the QCD dipole formalism. Realistic quarkonium wave functions in the $Q\bar Q$ rest frame are calculated by solving the Schrödinger equation with a subsequent Lorentz boost to high energy. We rely on several realistic $Q\bar Q$ potentials, which allow to describe well the quarkonium masses and decay widths, as well as data on diffractive electroproduction of quarkonia on protons. Nuclear effects are calculated with the phenomenological dipole cross sections fitted to DIS data. The higher twist quark shadowing related to the lowest $Q\bar Q$ Fock component of the photon, as well as the leading twist gluon shadowing, related to higher components containing gluons, are included. The results for coherent and incoherent photoproduction of charmonia and bottomonia in UPC of heavy nuclei are in good accord with available data from the LHC. They can also be verified in future experiments at electron-ion colliders.
