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The ALICE muon spectrometer will be able to separate the prompt (c-cbar state) and non-prompt (b-hadron decay) of J/Ψ thanks to a new detector, the Muon Forward Tracker. In addition, a major upgrade of the readout upgrade of the existing parts will allow to record a statistic ten times larger than the one available from previous runs.
This opens the possibility to perform high precision measurements to separate Quark-Gluon Plasma effects on charm and beauty quarks at forward rapidity. In particular, only J/Ψ regeneration mechanisms though recombination of c and c-bar quarks seem capable to explain nuclear modification factor (RAA) values at low transverse momentum obtained during runs I and II of the LHC. These RAA measurements must be improved by considering the prompt-J/Ψ only to better probe the suppression/regeneration mechanisms. The elliptic flow of inclusive J/Ψ still eludes a clear interpretation and here again the separation of prompt and non-prompt components is needed. Finally the non-prompt J/Ψ studies will provide insight on b-quarks energy loss.
The study of proton-proton collisions will be considered in order to obtain J/Ψ (prompt and non-prompt) reference measurement for heavy-ions collisions and for theoretical models comparisons.
The postdoctoral researcher may have to work for a few months at CERN to participate in detector commissioning and data taking shifts.
The postdoctoral researcher will be part of the ALICE team of IJCLab (see detailed description later). His/Her work will focus on the analysis of ALICE data, in particular the study of heavy flavor production (charm and beauty quarks) in heavy-ions and proton-proton collisions. These analyses are expected to lead one or several ALICE collaboration publications in peer-reviewed journals.
The Laboratory of the Physics of the two infinities Irène Joliot-Curie (IJCLab) is a laboratory under the supervision of the CNRS, the University of Paris-Saclay and the University of Paris. The research axes of the laboratory are nuclear physics, high energy physics, astroparticles and cosmology, theoretical physics, accelerators and particle detection as well as research, development and applications for health, energy and environment.
The postdoctoral researcher will work in the ALICE group of IJCLab which is composed of four permanent researchers, one professor from Paris-Saclay University, two PhD students (among them one will defend his PhD in Oct. 2021), and one postdoc. She/He will work in an international collaboration and will present regularly (in English) his work in the group and in collaboration meetings. The participation in physics schools and the presentation of the results in international conferences is foreseen. The team has a recognized expertise in heavy-flavors analysis, especially about J/Ψ production, which lead to many related publications (http://cern.ch/go/Db7D ).
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