Abstract
Recent measurements of e+e− pair production in pp and p–Pb collisions at the center-of-mass energy √SNN = 5.02 TeV are reported. Cold nuclear matter effects such as shadowing, as well as the possible presence of thermal radiation, are investigated in p–Pb collisions with the dielectron nuclear modification factor RpPb. Furthermore, results on dielectrons at low pT,ee in peripheral Pb–Pb collisions at √SNN = 5.02 TeV and in pp collisions at √S = 13 TeV are presented and compared to calculations.
Highlights
Dileptons and photons are unique tools to study the space–time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions
The data shown in this contribution were recorded with the ALICE experiment at the LHC during proton-proton, proto√n-lead (p–Pb) and lead-lead (Pb–Pb) runs at a nucleonnucleon center-of-mass energy sNN = 5.02 TeV and d√uring a campaign with a reduced magnetic field of the ALICE solenoid in pp collisions at s = 13 TeV
√ First, the measurement of the dielectron production in pp collisions at s = 5.02 TeV is shown on the left panel of Fig.√1 and constitutes an important baseline for studies in p–Pb and Pb–Pb collisions at the same sNN [1]
Summary
Dileptons and photons are unique tools to study the space–time evolution of the hot and dense matter created in ultra-relativistic heavy-ion collisions. √ First, the measurement of the dielectron production in pp collisions at s = 5.02 TeV is shown on the left panel of Fig.√1 and constitutes an important baseline for studies in p–Pb and Pb–Pb collisions at the same sNN [1]. Left: dielectron production in pp collisions at s = 5.02 TeV compared to the expectations f√rom known hadronic decays [1].
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