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arXiv 1409.7381hep-phhep-ex
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在LHC上pA碰撞中依赖于x的质子颜色涨落的证据

Evidence for x-dependent proton color fluctuations in pA collisions at the LHC

Massimiliano Alvioli, Brian Cole, Leonid Frankfurt, Dennis Perepelitsa, Mark Strikman

备注：
5 pages, 4 figures, few minor typos corrected, final version published in Phys.Rev.C, Rapid Communications
发表信息：
Phys. Rev. C 93, 011902 (2016)
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摘要：

我们认为，在大型强子对撞机的PA碰撞中观察到的前向喷流生产率的中心性依赖的格劳伯近似预测的偏差模式提供了第一个实验证据，部分子配置在抛射体质子包含一个部分子与大$x$与核目标的相互作用与显着小于平均截面，并具有小于平均尺寸。我们实现的相互作用强度的波动的影响，并使用ATLAS分析如何强子生产在向后rapidities取决于受伤的核子的数量，作为$x$依赖的相互作用强度$σ(x)$的函数的喷流生产率的中心依赖性进行定量预测。我们发现σ（x）\sim 0.6 ~σ_{tot}（pp）对x=0.6的数据给出了很好的描述，并可能揭示EMC效应的起源。

英文摘要：

We argue that the pattern of the deviation from the Glauber approximation prediction for the centrality dependence of the rate of forward jet production observed in pA collisions at the LHC provides the first experimental evidence that parton configurations in the projectile proton containing a parton with large $x$ interact with a nuclear target with a significantly smaller than average cross section and have smaller than average size. We implement the effects of fluctuations of the interaction strength and, using the ATLAS analysis of how hadron production at backward rapidities depends on the number of wounded nucleons, make quantitative predictions for the centrality dependence of the jet production rate as a function of the $x$-dependent interaction strength $σ(x)$. We find that σ(x)\sim 0.6 ~σ_{tot}(pp) gives a good description of the x=0.6 data and may shed a light on the origin of the EMC effect.

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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