arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1401.7611hep-phhep-ex
收藏

在LHC上研究质子内部胶子的横向动力学和极化

Accessing the Transverse Dynamics and Polarization of Gluons inside the Proton at the LHC

Wilco J. den Dunnen, Jean-Philippe Lansberg, Cristian Pisano, Marc Schlegel

摘要:

我们认为,重夸克偶素的研究,特别是$Υ$,产生背靠背与孤立的光子在$pp$碰撞在大型强子对撞机是最好的-目前唯一的-的方式来访问的横向动量和极化的胶子在非极化质子的分布。它们编码了QCD动力学的基本信息。我们已经推导出各种横向动量分布的解析表达式,这些分布可以在大型强子对撞机上测量,并允许直接提取上述量。为了评估这种测量的可行性,我们已经评估了预期的产量和相关的横动量分布的不同模型的胶子动力学内的质子。

英文摘要:

We argue that the study of heavy quarkonia, in particular that of $Υ$, produced back-to-back with an isolated photon in $pp$ collisions at the LHC is the best --and currently unique-- way to access the distribution of both the transverse momentum and the polarization of the gluon in an unpolarized proton. These encode fundamental information on the dynamics of QCD. We have derived analytical expressions for various transverse-momentum distributions which can be measured at the LHC and which allow for a direct extraction of the aforementioned quantities. To assess the feasibility of such measurements, we have evaluated the expected yields and the relevant transverse-momentum distributions for different models of the gluon dynamics inside a proton.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑