Measurement of dielectrons in pp, p_Pb and Pb_Pb collisions with ALICE at the LHC

16th International Conference on Strangeness in Quark Matter

Calivà, Alberto^1

NIKHEF Institite for Subatomic Physics, Utrecht University, Utrecht, Netherlands^1

关键词: Chiral symmetry;    Heavy flavor production;    High temperature;    Pb-Pb collisions;    Pp collisions;    Spectral function;    Ultrarelativistic heavy ion collision;    Virtual photons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/779/1/012052/pdf
DOI  :  10.1088/1742-6596/779/1/012052

来源: IOP

【 摘 要 】

Dielectrons are penetrating probes which carry unaffected information on the hot and dense medium created in ultra-relativistic heavy-ion collisions. The low-mass region of the dielectron spectrum (mπ0eeρ) is sensitive to virtual photon production and in-medium modifications of low-mass vector meson spectral functions. These modifications are connected to the restoration of chiral symmetry, which is expected at high temperature. Dielectrons are also sensitive to heavy-flavor production. In these proceedings, we present the preliminary results of dielectron measurements in pp collisions at √ = 7 TeV, in p-Pb collisions at √sNN = 5.02 TeV and in central (0-10%) Pb-Pb collisions at√sNN = 2.76 TeV with the ALICE experiment at the LHC. The expected scenario and perspectives for the dielectron measurement after the ALICE upgrade are also discussed.