Measurement of inclusive jet spectra in pp, p_Pb, and Pb_Pb collisions with the ALICE detector

10th International Workshop on High-pT Physics in the RHIC/LHC Era

Haake, Rüdigger^1

Institut für Kernphysik, Westfälische Wilhelms-Universit Münster, Münster

48149, Germany^1

关键词: Collision energies;    Different analysis techniques;    Different resolutions;    Heavy ion collision;    High-energy hadrons;    Kinematic properties;    Neutral particles;    Nuclear modification factors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/805/1/012008/pdf
DOI  :  10.1088/1742-6596/805/1/012008

来源: IOP

【 摘 要 】

Highly energetic jets are sensitive probes of the kinematic properties and the topology of high energy hadron collisions. Jets are collimated sprays of charged and neutral particles, which are produced in fragmentation of hard scattered partons from an early stage of the collision. In ALICE, jets have been measured in pp, p-Pb, and Pb-Pb collisions at several collision energies. While analyses of Pb-Pb events unveil properties of the hot and dense medium formed in heavy-ion collisions, pp and p-Pb collisions can shed light on hadronization and cold nuclear matter effects in jet production. Additionally, pp and p-Pb collisions serve as a baseline for disentangling hot and cold nuclear matter effects. A possible modification of the initial state is tested in p-Pb analyses. For the extraction of a jet signal, the exact evaluation of the background from the underlying event is an especially important ingredient. Due to the different nature of underlying events, each collision system requires a different analysis technique for removing the effect of the background on the jet sample. The focus of this publication is on the ALICE measurements of nuclear modification factors connecting p-Pb and Pb-Pb events to pp collisions. Furthermore, the radial jet structure is explored by comparing jet spectra reconstructed with different resolution parameters.