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

Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus–Nucleus Collisions 2012

Reed, Rosi^1

Yale University, New Haven, CT 06520, United States^1

关键词: Baseline measurements;    Electromagnetic calorimeter;    Heavy ion collision;    Kinematic range;    Measurements of;    Parton energy loss;    Pb-Pb collisions;    Production cross section;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/446/1/012006/pdf
DOI  :  10.1088/1742-6596/446/1/012006

来源: IOP

【 摘 要 】

Measurements of the suppression of high-pTparticles 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.