Speaker
Description
We present here a bottomonium suppression study with centrality, transverse momentum and rapidity dependence. The system under consideration is Pb$-$Pb collisions at $2.76$ TeV center of mass energy per nucleon for bottomonium (1S) state. The bottomonium bound states produced in the early hard scattering stage of collision traverses the Quark-Gluon Plasma (QGP) medium. We calculate a survival probability of the bottomonium due to dissociation by absorption of a gluon, collisional damping and the Debye color charge screening. We also accounted for the suppression due to the shadowing as cold nuclear matter effect. The QGP stage is evolved using (3+1)-dimensional viscous hydrodynamics based on Israel-Stewart’s second-order formalism with Wuppertal-Budapest Lattice QCD equation of state. The parameters in hydrodynamics are fixed such that the generated pions elliptic flow, $p_T$-spectra and rapidity spectra could match with the corresponding experimentally measured observables. The Survival probability calculated due to gluonic dissociation \& collisional damping processes, corrected for correlated recombination of bottomonia and feed-down has been compared with the experimentally measured equivalent quantity; namely nuclear modification factor ($R_{AA}$). We find a reasonably good agreement between the theoretical predicted and measured values for all of the three dependences.
| Session | Heavy Ions and QCD |
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