Etude de la production de muons issus des saveurs lourdes prédite par le modèle de Color Glass Condensate dans les collisions proton-proton et proton-plomb dans l'acceptance du spectromètre à muons de l'expérience ALICE du LHC

Abstract : The whole particle physics community is waiting for the Large Hadron Collider (LHC) commissioning at CERN. Indeed, the potential of discovery is very large in lots of themes. In particular, it will be possible to test the developments of the Quantum ChromoDynamics (QCD) achieved during last years. One of these, the Colour Glass
Condensate, describes the parton distributions of the nucleus in the saturation region, i.e. at small x. This theoretical description of the initial conditions of the heavy ion collisions is necessary to predict the heavy quark cross section production which evolves in a possible deconfined matter : the Quark-Gluon Plasma (PQG). ALICE is the LHC experiment mainly dedicated to the study of the PQG produced in ultra-relativistic heavy ion collisions. The measurement of J/Psi and Upsilon resonance suppression is a signature of this deconfined medium which is studied with the ALICE muon spectrometer. Its acceptance at large rapidity is well adapted for studying the prediction of CGC at small-x. The first part of this report presents the results of beam test experiment at CERN. It was the first time that the muon spectrometer tracking chambers were tested equipped with the final version of the front end electronics and the data acquisition system CROCUS. The relevant calibration parameters of the front end
electronics were introduced in the analysis in order to improve the quality of the track reconstruction. In the second part, these parameters were used in the simulations. The last part proposes a study of the CGC with the ALICE muon spectrometer, involving the measurements of open charm and open beauty.
Document type :
Theses
Nuclear Theory [nucl-th]. Université Paris Sud - Paris XI, 2007. French


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Submitted on : Thursday, February 7, 2008 - 10:45:52 AM
Last modification on : Thursday, February 7, 2008 - 10:47:53 AM

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Alexandre Charpy. Etude de la production de muons issus des saveurs lourdes prédite par le modèle de Color Glass Condensate dans les collisions proton-proton et proton-plomb dans l'acceptance du spectromètre à muons de l'expérience ALICE du LHC. Nuclear Theory [nucl-th]. Université Paris Sud - Paris XI, 2007. French. <tel-00188303v3>

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