Fine structures of azimuthal correlations of two gluons in the glasma

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 $\Delta \varphi =0$ 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.

7 pages, 4 figures

References in corpus (12)

• The Color Glass Condensate
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• Novel Collective Phenomena in High-Energy Proton-Proton and Proton-Nucleus Collisions
• Correlations from hydrodynamic flow in p-Pb collisions
• Elliptic and triangular flow in p+Pb and peripheral Pb+Pb collisions from parton scatterings
• Measurements of elliptic and triangular flow in high-multiplicity ${}^3$He$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Explanation of systematics of CMS p+Pb high multiplicity di-hadron data at ${\sqrt{s}}_{\mathrm{NN}}=5.02$ TeV
• Evidence for BFKL and saturation dynamics from di-hadron spectra at the LHC
• Forward-central two-particle correlations in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Two-gluon rapidity correlations of strong colour field in $pp$, $pA$ and $AA$ collisions
• Sub-leading correction of two-gluon rapidity correlations of strong colour field

Cited by in corpus (2)

• Large-rapidity ridge correlations from Color Glass Condensate
• CGC-induced longitudinal ridge in p-Pb collisions