Hadron productions and jet substructures associated with Z0/γ in Pb+Pb collisions at the LHC

We carry out a detailed study of medium modifications on Z0/γ+hadron correlations as well as jet substructures in association with Z0/γ in Pb+Pb collisions with■ Te V at the LHC.We utilize the linear Boltzmann transport (LBT) model to simulate the jet-medium interactions and medium response,and an extended cluster hadronization model to investigate the nonperturbative transition of quarks and gluons into final hadrons in heavy-ion collisions.Including hadronization effect,we can well describe Z0/γ+hadrons correlations and Z0/γ-tagged jet substructures in both p+p and Pb+Pb collisions simultaneously.Medium modification on jet profile and jet fragmentation functions indicate that particles carrying a large fraction of the jet momentum are generally closely aligned with the jet axis,whereas low-momentum particles are observed to have a much broader angular distribution relative to jet axis in Pb+Pb collisions due to jet-medium interactions.In particular,we find that Z0/γ-tagged hadron correlations are sensitive to the soft particles from the dense medium and medium response,while jet-substructures show weak dependence on those soft hadrons with only a fraction of them falling inside the jet area.