2020/10/26 by Horst Sebastian Scheid, Scheid, Horst Sebastian
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2010.13420
openalex publication_date 2020/10/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Heavy quarks are useful probes to investigate the properties of the\nQuark-Gluon Plasma (QGP) produced in heavy-ion collisions at the LHC, since\nthey are produced in initial hard scattering processes. To single out the\nsignals that are characteristic of the QGP, it is nevertheless crucial to\nunderstand the primordial heavy-quark production in vacuum, and to disentangle\nhot from cold nuclear matter effects. Moreover, observations of collective\neffects in high-multiplicity pp and p-Pb collisions show surprising\nsimilarities with those in heavy-ion collisions. Heavy-flavour production in\nsuch collisions could give further insight into the underlying processes. The\nheavy-flavour production can be studied with rm e+e- pairs from\ncorrelated semileptonic decays of heavy-flavour hadrons. Compared to single\nheavy-flavour measurements, the dielectron yield contains information about the\ninitial kinematical correlations between the charm and anti-charm quarks, which\nis otherwise not accessible, and is sensitive to soft heavy-flavour production.\nWe report results on correlated rm e+e- pairs in pp collisions\nrecorded by the ALICE detector at different collision energies. The production\nof heavy quarks is discussed by comparing the yield of dielectrons from\nheavy-flavour hadron decays as a function of invariant mass, pair transverse\nmomentum and distance of closest approach to the primary vertex with different\nMonte Carlo event generators. The heavy-flavour production cross sections are\nalso presented. Results from high-multiplicity pp collisions at \√(s) = 13\nTeV and the status of the p-Pb analysis at \√s rm NN = 5.02 TeV are\nreported as well.\n