Jet structure in pp and Pb-Pb collisions with the ALICE experiment

9th International Workshop on High-pT Physics at LHC

Busch, Oliver^1

Universität Heidelberg, Physikalisches Institut, Im Neuenheimer Feld 226, Heidelberg

69120, Germany^1

关键词: Hadron correlations;    Inclusive distributions;    Jet fragmentation;    Measurements of;    Momentum-dependent;    Monte Carlo Event generators;    Pb-Pb collisions;    Resolution parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/589/1/012003/pdf
DOI  :  10.1088/1742-6596/589/1/012003

来源: IOP

【 摘 要 】

We report results from the ALICE collaboration on jet production and jet properties in pp and Pb-Pb collisions at the LHC. The charged particle jet production cross-section and measurements of jet fragmentation and jet shape in pp collisions at √ s = 7 TeV are presented. The results are confronted with simulations from Monte Carlo event generators. Measurements of charged particle jets in Pb-Pb collisions at √sNN = 2.76 TeV with resolution parameter R = 0.2 and R = 0.3 show a strong momentum dependent suppression in central relative to peripheral collisions. The analysis of the semi-inclusive distribution of charged particle jets recoiling from a high-pT trigger hadron allows an unbiased measurement of the jet structure for larger cone radii. No signi-cant redistribution of the energy ow inside the jet cone is observed. Di-hadron correlations allow to assess jet structure at very low particle momenta. For 2