Binoy Krishna Patra

Learn More
We revisit the standard treatment [Xu, Kharzeev, Satz and Wang, Phys. Rev. C 53, 3051 (1996)] of J/ψ suppression due to gluonic bombardment in an equilibrating quark-gluon plasma. Effects arising from gluon fugacity, relative g − ψ flux, and ψ meson formation time are correctly incorporated in the formulation of the gluon number density, velocity-weighted(More)
We explicitly take into account the effect of hydrodynamic expansion profile on the gluonic breakup of J/ψ's produced in an equilibrating parton plasma. Attention is paid to the space-time inhomogeneities as well as Lorentz frames while deriving new expressions for the gluon number density n g , average dissociation rate˜Γ, and ψ survival probability S. A(More)
The long lifetime of the quark-gluon plasma likely to be created in the relativistic heavy ion collisions at RHIC and LHC energies renders it sensitive to the details of the equation of state of the quark-matter. We show that the p T dependence of the survival probability of the directly produced J/ψ at RHIC energies and that of the directly produced Υ at(More)
We consider the Brownian motion of a c¯ c pair produced in the very early satge of a quark-gluon plasma. The one-dimensional Langevin equation is solved formally to get purely mechanical properties at small and large times. Stochastically-averaged variances are examined to extract the time scales associated with swelling and ionization of the bound state.(More)
Lattice QCD results reveal that the critical parameters and the order of the quark-hadron phase transition are quite sensitive to the number of dynamical flavours and their masses included in the theory. Motivated by this result we develop a phenomenological equation of state for the quark-gluon plasma consisting of n f flavours retaining the entropy per(More)
This is a short review on the thermal, spectral representation in the real-time version of the finite temperature quantum field theory. After presenting a clear derivation of the spectral representation, we discuss the properties of its spectral function. Two applications of this representation are then considered. One is the solution of the Dyson equation(More)
We have examined the efficiency of baryon-number transport mechanism across the phase boundary in a cosmological quark-hadron phase transition through the proper estimate of baryon-number penetrability Σ h. For this purpose we have derived first the double-pair creation probability P b in terms of single-pair creation probabilty per unit time and unit(More)
We have studied the dissociation of heavy quarkonium states in a hot QCD medium by investigating the medium modifications to a heavy quark potential. Our theory shows that in-medium modification causes the screening of the charge, in contrast to the screening of the range of the potential in the usual Yukawa picture. However, both finally result in the(More)