Full Jet Reconstruction in 2.76 TeV pp and Pb-Pb collisions in the ALICE experiment

TL;DR

This paper reports on the reconstruction of full jets in 2.76 TeV proton-proton and lead-lead collisions at the LHC using the ALICE detector, providing insights into parton energy loss in hot, dense nuclear matter.

Contribution

It introduces a method for fully reconstructing jets in heavy-ion collisions at LHC energies, enabling detailed study of parton energy loss effects.

Findings

Successful jet reconstruction in Pb-Pb and pp collisions

Comparison of jet measurements with simulations

Insights into medium-induced energy loss effects

Abstract

Measurements of the suppression of high-pT particles and the away-side jets from heavy-ion collisions at RHIC have shown that medium-induced energy loss affects partons produced in the early stage of a heavy-ion collision. At LHC energies the initial production cross-section is much higher, which allows jets to be reconstructed with a wide kinematic range. Measuring fully reconstructed jets by taking advantage of the ALICE Electromagnetic Calorimeter allows for a more differential investigation of the parton energy loss. Parton energy loss will allow us to access key observables of the hot, dense matter created in heavy ion collisions. The data presented was collected during the 2.76 TeV Pb-Pb runs, as well as baseline measurements from the 2.76 TeV pp run. The procedures used to reconstruct jets and extract them from a fluctuating background will be discussed. The procedure for quantifying the background with a limited acceptance will also be discussed. These results are compared to pp measurements and simulations.