High Energy Physics Seminar: Dr. Mustafa Mustafa, Lawrence Berkeley National Laboratory
Title: “Measurements of electrons from heavy-hadrons decays
in the STAR experiment at RHIC"
Abstract: Lattice QCD calculations at zero-baryon density confirm the existence of a deconfined state of partonic matter at very high temperatures and energy densities. Such a state, called the Quark-Gluon Plasma (QGP), is argued to feature a major phase of the expanding matter created in Heavy Ion Collisions (HIC) at RHIC and the LHC experiments. Charm and bottom quarks masses, m_Q, are higher than other scales of the bulk-matter of QGP, m_Q >> Lambda_QCD, T and m_u, m_d, m_s. This has several implications that makes them unique probes to the created medium.
In this talk I will discuss measurements of spectra and azimuthal anisotropy of electrons from heavy-favor hadrons decays in p+p and Au+Au collisions at sqrt(s_NN) = 200 GeV. I will compare the nuclear modification factor and azimuthal anisotropy measurements to several theoretical models representative of the proposed mechanisms for heavy quarks medium interaction. I will also present measurements of electrons from heavy-flavor hadrons decays in Au+Au collisions at sqrt(s_NN)= 62.4GeV