Electrons from heavy- flavor semileptonic decays in proton-proton collisions at √s=13 TeV measured with the ALICE detector at the LHC

Abstract: Heavy-flavor hadrons, containing charm and bottom quarks, serve as a tool available for the characterization of the hot and dense strongly interacting Quark Gluon Plasma state of matter, produced in heavy-ion collisions. As a benchmark for heavy-ion collision measurements, proton-proton collisions are also studied. This thesis reports on the analysis of proton-proton collisions, reconstructed with the ALICE detector at √s= 13 TeV, to measure heavy-flavor semileptonic decays to electrons, for 2 < pT < 10 GeV/c. The project described here employs two different methods for the description of number of electrons from heavy-flavor hadrons, where the first analysis makes use of a background estimation and photon-electron rejection from the heavy-flavor electron candidates sample. The second analysis employs measurements of the fraction of electrons from heavy-flavor hadrons, as compared to other sources, by study of the Distance of Closest approach (DCA) distributions of particle tracks. The methods used are described and the results are presented and discussed together with an outlook for this project.