论文标题
超疗法PB+PB碰撞的独家$ J/ψ$到NLO PQCD
Exclusive $J/ψ$ production in ultraperipheral Pb+Pb collisions to NLO pQCD
论文作者
论文摘要
我们介绍了LHC超疗法重型离子碰撞（UPC）的连贯独家$ j/ψ$光生生量的首次NLO PQCD研究。作为Parton分布函数（PDF），将广义的Parton分布（GPD）以其前方限制为单位，我们量化了速度差异截面中的NLO贡献，表明不得忽略幅度的实际部分，研究Gluon和Quark的贡献，并将Scale-Choice和PDF的nlo贡献与NLO进行绘制。我们表明，尺度依赖性很重要，但是可以找到我们重现2.76和5.02 TEV UPC数据的比例选择。特别是，我们表明该过程显然对核夸克PDF的敏感性比以前想象的要敏感。
We present the first NLO pQCD study of coherent exclusive $J/ψ$ photoproduction in ultraperipheral heavy-ion collisions (UPCs) at the LHC. Taking the generalized parton distributions (GPDs) in their forward limit, as parton distribution functions (PDFs), we quantify the NLO contributions in the rapidity-differential cross section, show that the real part of the amplitude must not be neglected, study the gluon and quark contributions, chart the scale-choice and PDF uncertainties, and compare the NLO results with LHC and HERA data. We show that the scale dependence is significant but a scale choice can be found with which we reproduce the 2.76 and 5.02 TeV UPC data. In particular, we show that the process is clearly more sensitive to the nuclear quark PDFs than thought before.
