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首页> 外文期刊>Physical review, C >Evidence for x-dependent proton color fluctuations in pA collisions at the CERN Large Hadron Collider
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Evidence for x-dependent proton color fluctuations in pA collisions at the CERN Large Hadron Collider

机译：CERN大型HADRON撞机的PA碰撞中的X依赖质子颜色波动的证据

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摘要

The centrality dependence of forward jet production in pA collisions at the Large Hadron Collider (LHC) has been found to grossly violate the Glauber model prediction in a way that depends on the x in the proton. We argue that this modification pattern provides the first experimental evidence for x-dependent proton color fluctuation effects. On average, 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 sigma(x). We find that sigma(x) similar to 0.6 gives a good description of the data at x = 0.6. These findings support an explanation of the European Muon Collaboration effect as arising from the suppression of small-size nucleon configurations in the nucleus.
机译：已经发现，大型强子撞机（LHC）在PA碰撞中的正向喷射产生的中心依赖性以取决于质子中的X的方式严重违反了Glauber模型预测。我们认为这种修改模式为X依赖质子色波动效应提供了第一个实验证据。平均而言，Partenile质子中的Parton配置包含具有大x的Parton的Parton与核目标相互作用，具有明显小于平均横截面并且具有小于平均尺寸。我们利用相互作用强度的波动的影响，并使用对落后核心的Holron生产如何分析取决于受伤核的数量，使射流生产率的中心性依赖性的定量预测作为X-依赖性相互作用强度Sigma（x）。我们发现类似于0.6

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