Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 3: Heavy Ion Collisions and QCD Phases II
HK 3.2: Vortrag
Montag, 27. März 2017, 17:15–17:30, F 3
Low-Mass Dielectron Measurements in pp, p–Pb and Pb–Pb Collisions with ALICE — •Theo Bröker for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt
The measurement of electron-positron pairs (dielectrons) in the low invariant mass region allows to study the vacuum and in-medium properties of light vector mesons. Additionally, dielectrons from semileptonic decays of correlated heavy quark mesons carry information on the heavy-flavour production in the different collision systems. To quantify modifications of the dielectron production in Pb–Pb collisions, measurements in pp collisions serve as a reference, while the analysis of p–Pb collisions allows to disentangle cold from hot nuclear matter effects. During RUN1 at the LHC, studies of dielectron production in pp, p–Pb and Pb–Pb collisions have been performed.
In this talk, we present the dielectron invariant mass and transverse momentum distributions in pp collisions at √s=7 TeV, p–Pb collisions at √sNN=5.02 TeV and Pb–Pb collisions at √sNN=2.76 TeV.
Supported by BMBF.