| Thesis | |
| Report number | IPNO-T-11-03 ; CERN-THESIS-2011-441 |
| Title | Etude des J/psi dans le canal dimuon du spectromètre de l’expérience ALICE auprès du LHC dans les collisions proton+proton à $\sqrt{s}$ = 7 TeV |
| Translation of title | Study of J/psi in the dimuon channel with the ALICE muon spectrometer at the LHC for proton+proton collisions at $\sqrt{s}$ = 7 TeV |
| Author(s) | Boyer, Bruno (Orsay, IPN) |
| Publication | 2011 - 155. |
| Thesis note | PhD : Orsay, IPN : 2011 |
| Thesis supervisor(s) | Vazeille, Francois ; Riccati, Lodovico |
| Note | Presented on 2011-10-21 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; ALICE |
| Abstract | he ordinary nuclear matte density epsilon0 is around de 0,17 GeV/fm^3 . For a critical value between 5 and 10 epsilon0 or a temperature around 150 to 200 MeV, the lattice Quantum ChromoDynamics (lQCD) predicts a phase transition from the classical matter to a new state of matter called the Quark Gluon Plasma (QGP). In this state, quarks and gluons behave like free particles. Heavy ions collisions at the Large Hadron Collider (LHC) are used to recreate the condition needed for a QGP formation. ALICE (A Large Ion Collider Experiment) is one of the LHC experiment dedicated to the study the QGP. One of the possible signature is the suppression of the quarkonia (J/psi, Upsilon) by color screening. The ALICE muon spectrometer allows to measure the quarkonia, in a pseudo-rapidity domain -4 < eta < -2.5, using their decay into muons.The first part of the report presents the acceptance and efficiency corrections. These corrections are crucial for the analysis. This study has shown that the correction process is independent from the selected distribution used for the correction.The second part describes the analysis of the J/psi in proton+proton collisions at sqrt(s) = 7 TeV. |
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Record creato 2019-01-23, modificato l'ultima volta il 2019-06-03
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