Meson masses within the model of induced nonlocal quark currents. Abstract The model of induced quark currents formulated in our recent paper (Phys. Rev. D51, 174) is developed. The model being a kind of nonlocal extension of the bosonization procedure is based on the hypothesis that the QCD vacuum is realized by the (anti-)self-dual homogeneous gluon field. This vacuum field provides the analy...

1. Local change in the vacuum structure: from QED to QCD Matter in its present form was formed when our Universe emerged from the quark-gluon phase (QGP) at about 30µs into its evolution. To explore this early period in the laboratory, we study highly excited matter formed in relativistic heavy ion collision experiments: heavy nuclei crash into each other, and form compressed and energetically ...

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The phenomenon of gluon condensation is under vital discussion since more than fifteen years now [1]. The gluon condensate is an important quantity not only in the sum rule approach but also in high-energy hadron scattering and phenomenological models of confinement. Despite many indications of a non-trivial vacuum the quantitative picture is still vague [3]. Quarkonia are the simplest hadronic...

In the Relativistic Heavy ion Collider (RHIC) much larger background signals were occurring at BRAMS, one of the four experiments. This was especially pronounced at the time when vacuum conditions deteriorated due to the beam ionization profile monitor replacements. Recording the beam intensities during the store provided the beam lifetime. Predictions from the beam gas interactions to the abov...

Recently, it has been demonstrated that the chemical composition of jets in heavy ion collisions is significantly altered compared to the jets in the vacuum. This signal can be used to probe the medium formed in nuclear collisions. In this study we investigate the possibility that fast light quarks and gluons can convert to heavy quarks when passing through a quark-gluon plasma. We study the ra...

It is possible that under certain situations, in a relativistic heavy-ion collision, partons may expand out forming a shell like structure. We analyze the process of hadronization in such a picture for the case when the quarkhadron transition is of first order, and argue that the inside region of such a shell must correspond to supercooled (to T = 0) deconfined vacuum. Hadrons from that region ...