Results of the computer simulation of dilepton production from the expanding pion gas created in ... more Results of the computer simulation of dilepton production from the expanding pion gas created in ultrarelativistic Pb+Pb 160 GeV/n collisions are presented. Finite size of the expanding pion gas influences invariant mass spectrum of dileptons. Sensitivity of the shape of dilepton mass spectrum to the initial stage of the pion gas is discussed. Second order asymmetry in azimuthal distribution of dileptons is predicted for non-central collisions. Non-equilibrium nature of the pion gas expansion is found to exhibit itself in rapidity distribution of produced dilepton pairs.
Aim of this work was to test the idea of J.-Y.Ollitrault about the parallel squeeze-out type of t... more Aim of this work was to test the idea of J.-Y.Ollitrault about the parallel squeeze-out type of transversal flow in mid-rapidity region. For this purpose we have performed a computer simulation of the expanding pion gas created in non-central Pb-Pb 158GeV/n collisions. A squeeze-out type of asymmetry parallel to impact parameter in azimuthal distribution of pions is found and studied. The asymmetry is explained as a consequence of geometry of non-central collisions and the rescattering process.
The response of pseudoscalar and vector mesons to strong magnetic fields is studied within a simp... more The response of pseudoscalar and vector mesons to strong magnetic fields is studied within a simple constituent quark model using analogy with bound states of Positronium. Magnetic moments of charged vector mesons K*, D*, B* are predicted and it is found that Eta mesons have magnetic polarizability. In extremely strong magnetic fields, behaviour of J/Psi mesons is discussed. We speculate on the existence of an induced magnetic moment of Eta meson.
Results of the computer simulation of dilepton production from the expanding pion gas created in ... more Results of the computer simulation of dilepton production from the expanding pion gas created in ultrarelativistic Pb+Pb 160 GeV/n collisions are presented. Finite size of the expanding pion gas influences invariant mass spectrum of dileptons. Sensitivity of the shape of dilepton mass spectrum to the initial stage of the pion gas is discussed. Second order asymmetry in azimuthal distribution of dileptons is predicted for non-central collisions. Non-equilibrium nature of the pion gas expansion is found to exhibit itself in rapidity distribution of produced dilepton pairs.
Aim of this work was to test the idea of J.-Y.Ollitrault about the parallel squeeze-out type of t... more Aim of this work was to test the idea of J.-Y.Ollitrault about the parallel squeeze-out type of transversal flow in mid-rapidity region. For this purpose we have performed a computer simulation of the expanding pion gas created in non-central Pb-Pb 158GeV/n collisions. A squeeze-out type of asymmetry parallel to impact parameter in azimuthal distribution of pions is found and studied. The asymmetry is explained as a consequence of geometry of non-central collisions and the rescattering process.
The response of pseudoscalar and vector mesons to strong magnetic fields is studied within a simp... more The response of pseudoscalar and vector mesons to strong magnetic fields is studied within a simple constituent quark model using analogy with bound states of Positronium. Magnetic moments of charged vector mesons K*, D*, B* are predicted and it is found that Eta mesons have magnetic polarizability. In extremely strong magnetic fields, behaviour of J/Psi mesons is discussed. We speculate on the existence of an induced magnetic moment of Eta meson.
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