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arXiv 1507.05976hep-phnucl-th
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p $A$碰撞中定心仓带电粒子谱的涨落和快度依赖

Fluctuations and the rapidity dependence of charged particles spectra in fixed centrality bins in p$A$ collisions

Larry McLerran, Michal Praszalowicz

摘要:

我们认为,在饱和动量的大的波动是必要的,以解释ATLAS和ALICE数据在大型强子对撞机上测量的PA碰撞。使用一种形式的波动的分布激励的非线性演化方程的彩色玻璃冷凝物的理论研究,我们发现一个非常好的理论和测量分布之间的协议。如果饱和动量波动,我们认为质子探针的截面也应该波动,与以前的观察结果一致。最后,我们讨论了这些结果和他们可能的一致性,已知的多重性波动在这样的碰撞,并试图描述的脊效应从初始状态的属性。

英文摘要:

We argue that large fluctuations in the saturation momentum are necessary to explain the ATLAS and ALICE data on pA collisions measured at the LHC. Using a form for the distribution of fluctuations motivated by theoretical studies of the non-linear evolution equations for the Color Glass Condensate, we find a remarkably good agreement between theory and the measured distributions. If the saturation momentum fluctuates, we argue that the cross section for a proton probe should also fluctuate, consistent with previous observations. Finally we discuss these results and their possible consistency with what is known about multiplicity fluctuations in such collisions, and attempts to describe the ridge effect from properties of the initial state.

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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