arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.05615hep-exhep-ph
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CMS关于正向物理和衍射的研究成果述评

Review of results on forward physics and diffraction by CMS

Cristian Baldenegro

摘要:

CMS协作组在量子色动力学(QCD)的前向物理、衍射和小$x$极限物理方面的研究结果。特别是,在事件中,两个最外层的射流被分开的一个大的快度间隔的两个射流之间的方位角decorrelations的结果进行了讨论。此外,结果的基础上生产的两个射流分开一个大的快度差距(间隔无效的辐射)。预计这些dijet生产工艺对Balitsky-Fadin-Kuraev-Lipatov(BFKL)演变效应敏感。我们强调包容性的向前喷气生产和独家矢量介子生产的质子-铅碰撞,访问胶子密度在小$x$和$Q^2$饱和效应可能发挥作用的结果。摘要的基础上的事件活动的研究结果包括$Z$玻色子生产,带电粒子谱在最小的偏压事件,和能量密度在向前赝超快性。这些研究为蒙特卡罗事件发生器的调谐提供了有价值的输入,并基于微扰和非微扰QCD技术进行了测试预测。

英文摘要:

Results by the CMS Collaboration on forward physics, diffraction, and physics in the small-$x$ limit of quantum chromodynamics (QCD), are presented. In particular, results on azimuthal angle decorrelations between two jets in events where two outermost jets are separated by a large rapidity interval are discussed. In addition, results based on the production of two jets separated by a large rapidity gap (interval void of radiation) are presented. These dijet production processes are expected to be sensitive to Balitsky-Fadin-Kuraev-Lipatov (BFKL) evolution effects. We highlight results on inclusive forward jet production and on exclusive vector meson production in proton-lead collisions, which access gluon densities in the small-$x$ and $Q^2$ where saturation effects may play a role. A summary of results on underlying event activity studies based on inclusive $Z$ boson production, charged particle spectra in minimum bias events, and energy density in forward pseudorapidities is presented. These studies provide valuable inputs for Monte Carlo event generator tuning, and test predictions based on perturbative and non-perturbative QCD techniques.

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。

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