独家生产的重夸克子作为低x和低尺度胶子PDF的探针

C. Flett, S. Jones, Alan D. Martin, M. Ryskin, T. Teubner
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引用次数: 5

摘要

我们讨论了最近在LHCb测量的独家$J/\psi$光生产过程,作为限制和最终确定低$x$和低$Q$胶子PDF的手段。该过程的理论预测的尺度依赖性通过对已知$\bar{\text{MS}}$结果的驯服得到了系统的改进,这相当于恢复对数增强的小$x$项并实现小$Q$功率校正。横截面水平预测允许胶子PDF在低$(x, Q)$域的行为被确定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exclusive production of heavy quarkonia as a probe of the low x and low scale gluon PDF
We discuss the exclusive $J/\psi$ photoproduction process, as measured recently at LHCb, as a means of constraining and ultimately determining the low $x$ and low $Q$ gluon PDF. The scale dependence of the theoretical prediction for this process is shown to be systematically improved via a taming of the known $\bar{\text{MS}}$ result, this amounts to resumming logarithmically enhanced small-$x$ terms and implementing a small-$Q$ power correction. The cross section level predictions allow the behaviour of the gluon PDF in the low $(x, Q)$ domain to be determined.
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