Jet shower evolution in medium and dijet asymmetry in Pb+Pb collisions at the LHC

TL;DR

This paper investigates how jet showers evolve within quark-gluon plasma in heavy-ion collisions, analyzing energy loss mechanisms and their effects on dijet asymmetry observed at the LHC.

Contribution

It introduces a combined in-medium evolution model for leading partons and shower gluons, providing detailed insights into jet quenching phenomena.

Findings

Quantifies energy depletion from jets due to elastic collisions and scattering.

Shows the impact of medium interactions on dijet asymmetry in Pb+Pb collisions.

Provides numerical predictions consistent with LHC observations.

Abstract

We study the evolution of a partonic jet shower propagating through a quark-gluon plasma. Combining the in-medium evolutions of the leading parton and shower gluons, we compute the depletion of the energy from the jet cone by dissipation through elastic collisions with medium constituents, by scattering of shower partons to larger angles, and by radiation outside the jet cone. Numerical results are presented for the nuclear modification of dijet asymmetry in Pb+Pb collisions at the LHC.