arXiv 1909.009512019-09-03hep-ph

重夸克产生过程中与自旋相关的胶子分布及其测量

Spin dependent gluon distributions and their measurement in heavy quark production processes

Gary R. Goldstein

备注：: 8 pages, 2 figures

摘要：

胶子PDF、GPD和TMD在一系列散射过程中起着重要作用，包括SIDIS、DVCS、排他性介子电产生和p-p散射。自旋相关的胶子分布可以导致散射过程的角度依赖性和不对称性的独特特征。特别令人感兴趣的是重夸克的产生过程，其中重夸克的自旋观测值预示着潜在的胶子自旋依赖性。LHC的顶对产生是一个主要的例子，它主要通过胶子融合进行。极化顶部对通过各种通道的衰变在衰变产物-粒子和喷流之间产生各种相关性。胶子分布的组合，无论是极化的还是非极化的，都可以通过衰变产物的角度依赖性在实验中获得，正如将要展示的那样，以及胶子分布的“灵活”旁观者模型的预测。

英文摘要：

Gluon PDFs, GPDs and TMDs play a significant role in an array of scattering processes, including SIDIS, DVCS, exclusive meson electroproduction and p - p scattering. Spin dependent gluon distributions can lead to distinctive features in the angular dependences and asymmetries of the scattering processes. Of particular interest are heavy quark production processes, wherein spin observables of the heavy quarks adumbrate the underlying gluon spin dependences. Top pair production at LHC is a prime example that proceeds primarily via gluon fusion. Decays of polarized top pairs through various channels produce a variety of correlations among the decay products - particles and jets. Combinations of the gluon distributions, either polarized or unpolarized, can be accessed experimentally through angular dependences of decay products, as will be shown, along with predictions from a "flexible" spectator model of gluon distributions.

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英文摘要：

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