Measurement of electrons from semi-leptonic heavy-flavour hadron decays in proton-proton and Pb_Pb collisions with ALICE at the LHC

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

Fasel, Markus^1

Physikalisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany^1

关键词: Differential cross section;    Electronic channels;    Elliptic flows;    Heavy ion collision;    Nuclear modification factors;    Pb-Pb collisions;    Perturbative QCD;    Proton proton collisions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/446/1/012038/pdf
DOI  :  10.1088/1742-6596/446/1/012038

来源: IOP

【 摘 要 】

Heavy quarks are produced in early partonic hard scatterings and experience the full history of a heavy-ion collision. Consequently heavy quarks are a good tool to study properties of the hot and dense medium. In proton-proton collisions, the study of the production of heavy quarks provides an important test for perturbative QCD and serves as a reference for heavy ion collisions. Heavy-flavour measurements in the semi-electronic channel are performed with ALICE at midrapidity. We present the measurement of the pT- differential cross section in proton-proton collisions at 7 TeV, and of the nuclear modification factor and elliptic flow in Pb-Pb collisions at 2.76 TeV.