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Dielectron Production in Proton–Proton Collisions at √s =7 TeV with ALICE

by , for the ALICE collaboration
Institut für Kernphysik, Goethe-University, 60438 Frankfurt, Germany
Presented at Hot Quarks 2018 - Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions, Texel, The Netherlands, 7–14 September 2018.
Proceedings 2019, 10(1), 24; https://doi.org/10.3390/proceedings2019010024
Published: 15 April 2019
The ALICE Collaboration measured dielectron production as a function of the invariant mass ( m ee ), the pair transverse momentum ( p T , ee ) and the pair distance of closest approach ( DCA ee ) in pp collisions at s = 7 TeV. Prompt and non-prompt dielectron sources can be separated with the DCA ee , which will give the opportunity in heavy-ion collisions to identify thermal radiation from the medium in the intermediate-mass range dominated by contributions from open-charm and beauty hadron decays. The charm and beauty total cross sections are extracted from the data by fitting the spectra with two different MC generators, i.e., PYTHIA a leading order event generator and POWHEG a next-to-leading order event generator. Significant model dependences are observed, reflecting the sensitivity of this measurement to the heavy-flavour production mechanisms.
Keywords: ALICE; dielectron; heavy flavour ALICE; dielectron; heavy flavour
MDPI and ACS Style

Scheid, S., , for the ALICE collaboration; Dielectron Production in Proton–Proton Collisions at √s =7 TeV with ALICE. Proceedings 2019, 10, 24.

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