A review on correlations among the multiplicities of charge particles at SPS, RHIC and LHC energies

Abstract

Correlation study among the charge particle multiplicities plays an important role to analyze the heavy-ion interactions. Different observables like charged particle multiplicities, azimuthal anisotropy among the multiplicity of charge particles, transverse momentum of the multiplicities, etc. can correlate and these help to comprehend the various phases of heavy-ion collisions. We have reviewed two- and three-particle correlations, azimuthal correlations and Bose–Einstein correlations among the multiplicities of charge particles. We have also studied the forward-backward correlation technique to investigate the correlations among the charged multiplicities. Here, we have discussed various kinds of correlations at SPS energy, RHIC energy and LHC energy.