Two-particle angular correlations in pp and p-Pb collisions at LHC energies from a multi-phase transport model

Abstract

We apply a multi-phase transport (AMPT) model to study two-particle angular correlations in $pp$ collisions at $\sqrt{s}=7$ TeV. Besides being able to describe the angular correlation functions of meson-meson pairs, a large improvement for the angular correlations of baryon-baryon and antibaryon-antibaryon is achieved. We further find that the AMPT model with new quark coalescence provides an even better description on the anti-correlation feature of baryon-baryon correlations observed in the experiments. We also extend the study to p-Pb collisions at $\sqrt{s}=5.02$ TeV and obtained similar results. These results help us better understand the particle production mechanism in $pp$ and p-Pb collisions at LHC energies.

arXiv comment12 pages, 9 figures, submit for publication

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• Update of a Multi-Phase Transport Model with Modern Parton Distribution Functions and Nuclear Shadowing
• Two-particle angular correlations in heavy ion collisions from a multiphase transport model
• Hadronization using the Wigner function approach for a multiphase transport model
• Production of light antinuclei in $pp$ collisions by dynamical coalescence and their fluxes in cosmic rays near earth