System dependence of away-side broadening and $α$-clustering light nuclei structure effect in dihadron azimuthal correlations

Abstract

We investigate the effect of α cluster in relativistic collisions via di-hadron azimuthal correlation. A collision system scan involving α-clustered 12 C and 16 O is studied by using a multiphase transport model in the most central collisions at √ sNN = 6.37 TeV. We compare the correlation functions of different configurations and calculate root-mean-square width and kurtosis in the away-side region. The momentum dependence of di-hadron azimuthal correlation is also presented. The results show substantial distinction in correlation functions between Woods-Saxon distribution and α-clustered structures. We argue that the difference related to jet quenching is originated from initial geometry anisotropy. This work proposed that di-hadron azimuthal correlation is a potential probe to distinguish α-clustered nuclei.