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Title: Studies on Quark Gluon Plasma at Large Hadron Collider
Researcher: Ganesh, S.
Guide(s): Mishra, Madhukar
Keywords: Physics, Large Hadron Collider, Quark-Gluon, Plasma
University: Birla Institute of Technology and Science
Completed Date: 18/08/2016
Abstract: A comprehensive model to describe the bottomonium and charmonium suppression newlinedata obtained from the Large Hadron Collider (LHC), at center-of-mass energy newlinep newlinesNN = 2.76 TeV, is developed. The quasi-particle model (QPM) equation of state newline(EOS) is employed for the quark-gluon plasma (QGP) expanding under Bjorken s newlinescaling law. Earlier, colour screening was assumed to be a dominant mechanism for newlineJ/Ã or ¨ suppression in QGP. The effect of colour screening on J/Ã and ¨ suppression newlineis analyzed. newlineFor ¨ suppression, colour screening during bottomonium production, gluon induced newlinedissociation and collisional damping due to the imaginary part of the potential newlinebetween b¯b pair are included. In literature, the formation time of ¨ is usually taken newlineto be a constant and is taken to be the vacuum formation time. A formulation to newlinedetermine the modification of the formation time based on the temperature of the newlineQGP is proposed. It is determined by using the solution of the time independent newlineSchr¨odinger wave equation and is compared with another approach based on time newlinedependent Schr¨odinger wave equation simulation. It is found that these two independent newlinemethods, based on different axioms, give similar results for the formation newlinetime. The effect of the temperature dependent formation time on ¨ suppression is newlinethen analyzed. Cold nuclear matter (CNM) effects and feed-down from higher resonance newlinestates of ¨ have also been included in the present work. The pT integrated newlinesuppression of the bottomonium states at mid rapidity is determined as a function of newlinecentrality. The results for the net suppression as a function of centrality, compares newlineclosely with the recent centrality dependent suppression data from Pb+Pb collisions at the LHC energy, in the mid rapidity region. newline
Appears in Departments:Physics

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