Full jet evolution in quark-gluon plasma and nuclear modification of jet production and jet shape in Pb+Pb collisions at 2.76 ATeV at the LHC

TL;DR

This paper models the evolution of full jets in quark-gluon plasma using coupled transport equations, incorporating all partonic processes and medium interactions, to study jet modifications in Pb+Pb collisions at LHC energies.

Contribution

It introduces a comprehensive formalism for full jet evolution in quark-gluon plasma, including all partonic processes and medium effects, combined with hydrodynamic simulations.

Findings

Jet shape modification is sensitive to interaction mechanisms and jet energies.

The formalism successfully describes nuclear modifications of jet spectra and correlations.

Medium effects significantly alter jet observables in heavy-ion collisions.

Abstract

We study the evolution of full jet shower in quark-gluon plasma via solving a set of coupled differential transport equations for the three-dimensional momentum distributions of quarks and gluons contained in the full jets. In our jet evolution equations, we include all partonic splitting processes as well as the collisional energy loss and transverse momentum broadening for both the leading and radiated partons of the full jets. Combining with a realistic (2+1)-dimensional viscous hydrodynamic simulation for the space-time profiles of the hot and dense nuclear medium produced in heavy-ion collisions, we apply our formalism to calculate the nuclear modification of single inclusive full jet spectra, the momentum imbalance of photon-jet and dijet pairs, and jet shape function (at partonic level) in Pb+Pb collisions at 2.76 ATeV. The roles of various jet-medium interaction mechanisms on the full jet modification are studied. We find that the nuclear modification of jet shape is sensitive to the interplay of different interaction mechanisms as well as the energies of the full jets.