321 citations · 2k across the 69 of their papers we have counts for
33 papers · 1 filter
Cosmic Separation of Phases: the microsecond universe and the neutron star
Bikash Sinha
It is entirely plausible under reasonable condition, that a first order QCD phase transition occurred from quarks to hadrons when the universe was about a microsecond old. Relics,…
Electromagnetic signals from Au+Au collisions at RHIC energy, =200 GeV and Pb+Pb collisions at LHC energy, =2.76 TeV
Jajati K. Nayak, Bikash Sinha
We analyse the recently available experimental data on direct photon productions from Au+Au collisions at =200 GeV RHIC and from Pb+Pb collisions at =…
Dilepton to photon ratio, a viscometer of QGP
A. K. Chaudhuri, Bikash Sinha
In the Israel-Stewart's 2nd order hydrodynamics, a viscous effect on dilepton emission from a QGP medium is investigated. Dileptons are strongly affected by QGP viscosity. Large in…
Direct photon production from viscous QGP
A. K. Chaudhuri, Bikash Sinha
We simulate direct photon production in evolution of viscous QGP medium. Photons from Compton and annihilation processes are considered. Viscous effect on photon production is very…
Nuclear suppression at low energy heavy ion collisions
Santosh K Das, Jan-e Alam, Payal Mohanty +1
The effects of non-zero baryonic chemical potential on the drag and diffusion coefficients of heavy quarks propagating through a baryon rich quark gluon plasma have been studied. T…
Muon pairs from In+In collision at SPS energy
Jajati K Nayak, Jan-e Alam, Tetsufumi Hirano +2
NA60 collaboration has extracted the inverse slope parameters, T_{eff} of the dimuon spectra originating from the In+In collisions at root(s_NN)=17.3 GeV for various invariant mass…
Measuring initial temperature through photon to dilepton ratio in heavy ion collision
Jajati K. Nayak, Jan-e Alam, Sourav Sarkar +1
Theoretical calculation of transverse momentum() distribution of thermal photons and dileptons originating from ultra-relativistic heavy ion collisions suffer from several unc…
Thermal photons to dileptons ratio at LHC
Jajati K. Nayak, Jan-e Alam, Sourav Sarkar +1
It is shown that the ratio of transverse momentum (p_T) distribution of thermal photons to dileptons produced in heavy ion collisions reaches a plateau above p_T=1 GeV. We argue th…
Thermal photon to dilepton ratio in ultra-relativistic heavy ion collisions
Jajati K. Nayak, Jane Alam, Sourav Sarkar +1
The ratio of transverse momentum distribution of thermal photons to dilepton has been evaluated. It is observed that this ratio reaches a plateau beyond a certain value of transver…
Thermal Radiation from Au + Au Collisions at \sqrt{s} = 200 GEV/A Energy
Jan-e Alam, Jajati K. Nayak, Pradip Roy +2
The transverse momentum distribution of the direct photons measured by the PHENIX collaboration in collisions at GeV/A has been analyzed. It has been shown…
Charmonium at LHC: Production, Propagation and Decay
Pradip Roy, Abhee K. Dutt-Mazumder, Jane Alam +1
The productions of muon pairs from the decay of heavy quarkonia have been evaluated for different centrality of the nuclear collisions at LHC energies. The effects of the various c…
Lepton interferometry in relativistic heavy ion collisions - a case study
Jan-e Alam, Bedangadas Mohanty, A. Rahaman +2
We propose intensity interferometry with identical lepton pairs as an efficient tool for the estimation of the source size of the expanding hot zone produced in relativistic heavy…
Photon interferometry and size of the hot zone in relativistic heavy ion collisions
Jan-e Alam, Bedangadas Mohanty, Pradip Roy +2
The parameters obtained from the theoretical analysis of the single photon spectra observed by the WA98 collaboration at SPS energies have been used to evaluate the two photon corr…
Space-time evolution of ultra-relativistic heavy ion collisions and hadronic spectra
B. K. Patra, Jan-e Alam, Pradip Roy +2
The space-time evolution of the hot and dense matter formed after the collisions of heavy nuclei at ultra-relativistic energies is investigated using (3+1) dimensional hydrodynamic…
Photons from Nucleus-Nucleus Collisions at Ultra-Relativistic Energies
Jan-e Alam, T. Hatsuda, Tapan K. Nayak +3
We compare the photon emission rates from hot hadronic matter with in-medium mass shift and Quark Gluon Plasma (QGP). It is observed that the WA98 data can be well reproduced by ha…
Spectral Red-Shift Versus Broadening from Photon and Dilepton Spectra
Jan-e Alam, Pradip Roy, Sourav Sarkar +1
We estimate the photon and dilepton emission rates from hot hadronic matter with in-medium spectral shift and broadening of vector mesons. It is observed that both the WA98 photon…
Emission of single photons, hadrons, and dileptons in collisions at CERN SPS and quark hadron phase transition
Dinesh Kumar Srivastava, Bikash Sinha, Ioulia Kvasnikova +1
The production of single photons in collisions at the CERN SPS as measured by the WA98 experiment is analysed. A quark gluon plasma is assumed to be formed initially, which…
Erratum: Eur. Phy. J. C 12 (2000) 109 (A Second Look at Single Photon Production in Collisions at 200 AGeV and Implications for Quark Hadron Phase Transition)
Dinesh Kumar Srivastava, Bikash Chandra Sinha
It has been shown recently that the values of and which appear in Eqs.(2) and (5) of the above paper and which are taken from the work of Aurenche et al are too large b…
Radiation of single photons from collisions at the CERN SPS and quark hadron phase transition
Dinesh Kumar Srivastava, Bikash Sinha
The production of single photons in collisions at the CERN SPS as measured by the WA98 experiment is analysed. A quark gluon plasma is assumed to be formed initially, which…
A Second Look at Single Photon Production in S+Au Collisions at 200 AGeV and Implications for Quark Hadron Phase Transition
Dinesh Kumar Srivastava, Bikash Chandra Sinha
We reanalyze the production of single photons in S+Au collisions at CERN SPS to investigate: i) the consequences of using a much richer equation of state for hadrons than the one u…
Electromagnetic probes of hot and dense hadronic matter
Jan-e Alam, Sourav Sarkar, Pradip Roy +1
The formalism of photon and dilepton productions in a thermal bath are discussed in the frame work of finite temperature field theory. The emission rate has been expressed in terms…
Photons from Pb + Pb and S + Au Collisions at CERN SPS Energies
Sourav Sarkar, Pradip Roy, Jan-e Alam +1
The effects of the variation of vector meson masses and decay widths on photon production from hot strongly interacting matter formed after Pb + Pb and S + Au collisions at CERN SP…
Unstable particles in matter at a finite temperature: the rho and omega mesons
Jan-e Alam, Sourav Sarkar, Pradip Roy +2
Unstable particles (such as the vector mesons) have an important role to play in low mass dilepton production resulting from heavy ion collisions and this has been a subject of sev…
Omega meson as a chronometer and thermometer in hot-dense hadronic matter
Pradip Roy, Sourav Sarkar, Jan-e Alam +2
Changes in the properties of the vector mesons in hot and dense hadronic matter, as produced in heavy ion collisions, lead to the intriguing possibility of the opening of the decay…