Jan 10 – 15, 2021
Weizmann Institute of Science
Asia/Jerusalem timezone
See you at IS2023 in Copenhagen in June 2023

Dielectron production in pp and p-Pb collisions at sqrt(s_NN) = 5.02 TeV

Jan 11, 2021, 7:40 PM
1h 30m
Patio (vDLCC)



bullet talk (poster) The initial stages of heavy-ion collisions Poster


Horst Sebastian Scheid (Goethe University Frankfurt (DE))


Dileptons are a prime probe of the deconfined state of strongly interacting matter, the quark--gluon plasma (QGP), produced in high-energy heavy-ion collisions, as they are not affected by strong interactions after their creation.
A measurement of the thermal radiation from the QGP in the mass region between the $\phi$ and the $\rm J/\psi$ allows to estimate the medium temperature. In this region the main component of the dielectron continuum is originating from correlated semileptonic decays of open-charm and beauty hadrons.
The production of dielectrons originating from the decays of heavy-flavour hadrons in small systems can provide crucial insight for the measurement of thermal radiation in nucleus-nucleus collisions.

In this talk, the latest results on dielectron production in pp and p--Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV will be presented.
We will discuss the production of heavy-flavour quarks in pp collisions compared with model predictions including different quark production mechanisms, as well as a possible modification of their production cross sections in p--Pb collisions. The data from both collision systems will be presented in terms of the dielectron nuclear modification factor $R_{\rm pPb}$.
Possible deviations from the vacuum baseline will be addressed in the light of present cold nuclear matter effects along with possible collective effects in small systems.

Primary author

Horst Sebastian Scheid (Goethe University Frankfurt (DE))

Presentation materials