Recent experiments at RHIC and theoretical considerations indicate that the quark-gluon plasma, present in the fireball of relativistic heavy-ion collisions, might be in a liquid phase. The liquid state can be identified by characteristic correlation and structure functions. Here definitions of the structure functions and pair correlations of the quark-gluon plasma are presented as well as pert...

It is shown that instantons provide a natural mechanism to explain an unusual azimuthal angular dependence of the production of the even-parity glueball candidates in central pp collision. A different azimuthal angular dependence for instanton-induced production of the odd-parity glueballs is predicted. [email protected] Recently, very interesting experimental data on central production o...

We present the results of the calculation of the one-loop correction to the effective vertex for the quark-antiquark pair production in collisions of the virtual photon with the Reggeized gluon. This vertex is supposed then to be used for the calculation of the virtual photon impact factor, which is extremely important, for instance, for the description of the small x deep inelastic scattering ...

We propose a method to treat the three-gluon self-interaction vertex in the position space in D = 4− 2ǫ dimensions. As an example, we calculate a two-loop contribution to auxiliary Lcc vertex in the Landau gauge which contains the three-gluon vertex for SU(N) YangMills theory. We represent the integral expression as a sum of separate contributions so that each of the contributions is a double f...

We investigate the interaction between H-dibaryons employing a quark cluster model with a one-gluon-exchange potential and an effective meson exchange potential (EMEP). A deeply-bound state of two H-dibaryons due to the medium range attraction of the EMEP is obtained. The bound H–H system has a size of about 0.8 ∼ 0.9 fm because of the short-range repulsion generated by the color-magnetic inter...

Based on the kinetic theory, the non-Abelian medium property of hot Quark-Gluon Plasma is investigated. The nonlinearity of the plasma comes from two aspects: The nonlinear wave-wave interaction and self-interaction of color field. The non-Abelian color permittivity is obtained by expanding the kinetic equations to third order. As an application, the nonlinear Landau damping rate and the nonlin...

The theoretical predictions for prominent processes like gg → H or the t t̄ cross section still suffer from a rather large uncertainty stemming from the parton distributions functions (PDFs) in the proton, in particular from the gluon distribution. In view of the LHC with its large gluon luminosity, it is therefore important to analyse how present experiments can be used to constrain the gluon f...

Hadronic physics at low energy is expected to be described by the infrared properties of quantum chromodynamics ~QCD!, whose nonperturbative character in general forces us to make use of approximate models in order to understand the strong interaction effects at a small momentum scale. One of these models became known as the global color model ~GCM! @1–3#, which is a quark-gluon quantum field t...

Lattice simulations along with studies in continuum QCD indicate that non-perturbative quantum fluctuations lead to an infrared regularisation of the gluon propagator covariant gauges form effective mass-like behaviour. In present work we propose analytic understanding this phenomenon terms condensation through a dynamical version Higgs mechanism, leading emergence color condensates. Within fun...

A program to simulate the production of heavy quarks through the boson-gluon fusion process in ep collisions is presented. The full electroweak structure of the electron–gluon interaction is taken into account as well as the masses of the produced heavy quarks. Higher order QCD radiation is treated using initial and final state parton showers, and hadronization is performed using the Lund strin...