Collisional broadening of angular correlations in a multiphase transport model

Abstract

Systematic comparisons of jetlike correlation data to radiative and collisional energy loss model calculations are essential to extract transport properties of the quark-gluon medium created in relativistic heavy ion collisions. This paper presents a transport study of collisional broadening of jetlike correlations, by following parton-parton collision history in a multiphase transport (AMPT) model. The correlation shape is studied as a function of the number of parton-parton collisions suffered by a high transverse momentum probe parton ($N_{\mathrm{coll}}$) and the azimuth of the probe relative to the reaction plane (${\varphi }_{fin.}^{\mathrm{probe}}$). Correlation is found to broaden with increasing $N_{\mathrm{coll}}$ and ${\varphi }_{fin.}^{\mathrm{probe}}$ from in- to out-of-plane direction. This study provides a transport model reference for future jet-medium interaction studies.

Comments: 6 pages 4 figures. Change from v1 to v2: removed one figure (limited usefulness), enriched Fig.2. v3: published version