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Cold nuclear matter effects in Drell-Yan process and charmonium production

Abstract : The Jet Quenching phenomenon observed in the heavy ions collisions at the LHC and RHIC made it possible to highlight the radiation energy loss effects of quarks and gluons propagating in a QCD medium. Another way to the properties of the nuclear matter is to consider the production of hard processes in hadron-nuclei collisions. In this case, the nuclear medium, the cold nuclear matter, is simple; its density and size are known. The Drell-Yan process and charmonium production are investigated in this thesis through an experimental and phenomenological study.The COMPASS collaboration at CERN collected the Drell-Yan and Jpsi events in high statistics in pion-nuclei collisions on two nuclear targets: tungsten (W) and aluminium (Al). From the signal extraction to the evaluation of nuclear dependence of the cross sections, including Monte Carlo simulations, each step of the experimental analysis is discussed. Finally, a global analysis of the Drell-Yan and Jpsi nuclear world data, including the COMPASS preliminary data, was performed. It highlighted the radiative energy loss and transverse momentum broadening effects. A precise extraction of the properties of the transport in the nuclear matter was carried-out.
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Submitted on : Tuesday, January 26, 2021 - 2:43:15 PM
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Charles-Joseph Naïm. Cold nuclear matter effects in Drell-Yan process and charmonium production. High Energy Physics - Phenomenology [hep-ph]. Université Paris-Saclay, 2020. English. ⟨NNT : 2020UPASP038⟩. ⟨tel-03121565⟩

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