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arXiv 2408.14693hep-phhep-exnucl-exnucl-th
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LHC上的长程能量-能量关联子

Long Range Energy-energy Correlator at the LHC

Yuxun Guo, Xiaohui Liu, Feng Yuan

AI总结:

本文研究了LHC质子-质子碰撞中强子的前后向方位角关联,应用核子能量-能量关联子框架,揭示了QCD振幅螺旋度结构预测的$\cos(2\phi)$不对称性幂次计数规则,有助于解释高多重数事件中的近侧脊行为。

摘要:

我们研究了LHC质子-质子碰撞中,与中心快度区域多粒子产生相关联的强子前后向方位角关联。我们应用了核子能量-能量关联子框架,其中自旋胶子分布引入了非平庸的$\cos(2\phi)$不对称性。我们将证明,QCD振幅的基本螺旋度结构预测了独特的幂次计数规则:对于双喷注,$\cos(2\phi)$不对称性从${O}(\alpha_s^2)$阶开始;对于三喷注,从${O}(\alpha_s)$阶开始;对于四喷注(及更多)产生,则从${O}(1)$阶开始。我们的结果将有助于理解LHC $pp$碰撞高多重数事件中观测到的近侧脊行为这一长期存在的谜题。

英文摘要:

We study the forward-backward azimuthal angular correlations of hadrons in association with multi-particle production in the central rapidity region in proton-proton collisions at the LHC. We apply the nucleon energy-energy correlator framework, where the spinning gluon distribution introduces a nontrivial $\cos(2ϕ)$ asymmetries. We will demonstrate that the fundamental helicity structure of QCD amplitudes predicts a unique power counting rule: $\cos(2ϕ)$ asymmetry starts at ${O}(α_s^2)$ order for dijet, ${O}(α_s)$ for three jet and ${O}(1)$ for four (and more) jet productions. Our results will help us to understand the long standing puzzle of nearside ridge behavior observed in high multiplicity events of $pp$ collisions at the LHC.

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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