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Proceedings 2019, 10(1), 24; https://doi.org/10.3390/proceedings2019010024

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

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.
Published: 15 April 2019
PDF [469 KB, uploaded 15 April 2019]

Abstract

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
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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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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