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arXiv 1807.06388hep-phhep-exnucl-exnucl-th
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大型强子对撞机上前向双强子关联中的胶子饱和信号

Signature of gluon saturation in forward di-hadron correlations at the Large Hadron Collider

Giuliano Giacalone, Cyrille Marquet

摘要:

我们认为,胶子饱和效应可能是可见的大型强子对撞机(LHC)的数据。我们期待在p-Pb碰撞中测量的两个粒子的相关性的远离侧峰的中心依赖性,使用ALICE数据在midrapidity,和LHCb数据在前进的快度。一旦从关联函数中去除在近侧峰值处测量的集体流状信号,远侧峰值的中心性依赖性在前向区域中比在中快度处强得多。我们认为,这是一个非常具体的预测的饱和度框架,我们比较LHCb数据的彩色玻璃冷凝理论内的一个国家的最先进的计算。

英文摘要:

We argue that gluon saturation effects may be visible in Large Hadron Collider (LHC) data. We look at the centrality dependence of the away-side peak of two-particle correlations measured in p-Pb collisions, using both ALICE data at midrapidity, and LHCb data at forward rapidity. Once the collective flow-like signal measured at the near-side peak is removed from the correlation function, the centrality dependence of the away-side peak turns out to be much stronger in the forward region than at midrapidity. We argue that this is a very specific prediction of the saturation framework, and we compare LHCb data to a state-of-the-art calculation within the Color Glass Condensate theory.

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