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arXiv · 1710.02829

Fine structures of azimuthal correlations of two gluons in the glasma

Hengying Zhang·Donghai Zhang·Yeyin Zhao·Mingmei Xu·Xue Pan·Yuanfang Wu
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Abstract

We investigate the azimuthal correlations of the glasma in p-p collisions at $\sqrt{s_{\mathrm{NN}}}=7$ TeV by using the CGC formalism. As expected, the azimuthal correlations show two peaks at $\Delta\phi=0$ and $\pi$ which represent collimation production in CGC. Beyond that, azimuthal correlations show fine structures, i.e. bumps or shoulders between the two peaks, when at least one gluon has small $x$. The structures are demonstrated to be associated with saturation momentum, and likely appear at transverse momentum around $2Q_{\mathrm{sp}}=1.8$ GeV$/$c.

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Hengying Zhang, Donghai Zhang, Yeyin Zhao, Mingmei Xu, Xue Pan, Yuanfang Wu. 2017-10-08. Fine structures of azimuthal correlations of two gluons in the glasma. https://doi.org/10.1103/physrevd.97.034003

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