J/ψ transverse momentum distribution in high energy nuclear collisions

By Yunpeng Liu, Zhen Qu, N. Xu, P. Zhuang. 2009

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Abstract The transverse momentum ( p t ) dependence of J / ψ production in heavy ion collisions is investigated in a transport model with both initial production and continuous regeneration of charmonia. The competition between the two production mechanisms results in a p t suppression in central collisions, the gluon multi-scattering in the initial stage leads to a high p t enhancement, and the regeneration populates J / ψ s at low p t region and induces a minimum in R AA ( p t ) . These three phenomena are indeed observed in both 200 GeV Cu + Cu and Au + Au collisions at RHIC energy.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c2c6a119034b691d3eaecff1902137111e4f283b