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arXiv · 1512.00166

Two-gluon rapidity correlations of strong colour field in $pp$, $pA$ and $AA$ collisions

Ye-Yin Zhao·Ming-Mei Xu·Heng-Ying Zhang·Yuan-Fang Wu
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Abstract

Using the CGC formalism, we calculate the two-gluon rapidity correlations of strong colour fields in $pp$, $pA$ and $AA$ collisions, respectively. If one trigger gluon is fixed at central rapidity, a ridge-like correlation pattern is obtained in symmetry $pp$ and $AA$ collisions, and a huge bump-like correlation pattern is presented in asymmetry $pA$ collisions. It is demonstrated that the ridge-like correlation patterns are caused by the stronger correlation with the gluon of colour source. The transverse momentum and incident energy dependence of the ridge-like correlation pattern is also systematically studied. The ridge is more likely observed at higher incident energy and lower transverse momentum of trigger gluon.

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Ye-Yin Zhao, Ming-Mei Xu, Heng-Ying Zhang, Yuan-Fang Wu. 2016-02-29. Two-gluon rapidity correlations of strong colour field in $pp$, $pA$ and $AA$ collisions. https://doi.org/10.1016/j.nuclphysa.2016.06.007

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