Nuclear modification of charged hadron production at LHC

TL;DR

This paper investigates the suppression of charged hadron production in Pb+Pb collisions at the LHC, analyzing parton energy loss in quark-gluon plasma and predicting azimuthal anisotropy effects.

Contribution

It extends previous models of parton energy loss to LHC energies and provides empirical estimates of the momentum transport coefficient, along with predictions for anisotropy.

Findings

Quantifies parton energy loss in LHC conditions

Provides empirical estimate of the transport coefficient 

Predicts azimuthal anisotropy in non-central collisions

Abstract

We analyze the recent results for suppressed production of charged hadrons for Pb+Pb collisions at the center of mass energy of 2.76 TeV/nucleon-pair. We closely follow the treatment used recently by us where partons lose energy due to radiation of gluons following multiple scatterings while traversing the quark gluon plasma, before fragmenting into hadrons at the center of mass energy of 200 GeV/nucleon-pair. We obtain an empirical value for the momentum transport coefficient $(\widehat{q})$ and provide predictions for azimuthal anisotropy of hadron momenta for non-central collisions.