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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Heavy Ion Collisions and QCD Phases VIII

HK 39.4: Vortrag

Donnerstag, 30. März 2017, 15:00–15:15, F 1

NLO + Parton Shower Calculation of Heavy Flavour Electrons with Nuclear PDFs — •Florian Herrmann — Westfälische Wilhelms-Universität, Münster, Germany

Heavy flavour (beauty and charm) quarks are of special interest for the study of the Quark-Gluon Plasma as they are predominantly produced in the initial hard-scattering process and participate in the entire evolution of the system created in heavy-ion collisions. Thus, heavy flavours are an excellent probe to study in-medium energy loss (mechanisms) in nuclear collisions by calculating the nuclear modification factor R_AA or the azimuthal anisotropy and especially the elliptic flow v₂ of heavy-flavour particles. Experimentally, heavy flavours are often investigated using measurements of electrons from heavy-flavour hadron decays. These electrons can be separated statistically from the background originating from light flavours and gluons and provide insight into the colour charge and mass dependence of parton energy loss. We present the relative contribution of electrons from beauty hadron decays to the yield of electrons from heavy-flavour hadron decays estimated with Monte Carlo simulations based on POWHEG. The calculations are performed for p–p and Pb–Pb collisions at √s_NN = 2.76 TeV. Nuclear effects are taken into account using the nuclear parton distribution functions EPS09 and nCTEQ15. These calculations serve as an essential ingredient to separate the contributions of charm and beauty quarks in the measurements of the p_T-differential invariant cross section and elliptic flow of electrons from heavy-flavour hadron decays. – Supported by DFG GRK2149