The binary interaction of large size instantons in a SU(2) Yang-Mills theory is obtained from the one-loop effective action for the field strength. The instanton interaction is calculated as a function of the instanton separation and in dependence on radius and relative orientation of the instantons. Two equally oriented instantons with radii large compared with the scale defined by the gluon c...

One of the primary goals of the RHIC Spin program is to determine the gluon polarization distribution within the proton. At leading order, pp collisions involve a mixture of quark-quark, quark-gluon, and gluon-gluon scattering. In RHIC, the gluon-gluon and quark-gluon contributions dominate, making the accelerator an ideal tool to explore gluon polarization. The STAR experiment has measured the...

The static potentials for quark-antiquark-gluon and 3-gluon systems are computed with lattice QCD methods. For the quark-antiquark-gluon hybrid meson the static potential is obtained for different values of the angle between the quark-gluon and antiquark-gluon segments. The simulations support the formation of an adjoint string for small angles, while for large angles, the adjoint string is rep...

We study the nucleon-nucleon interaction in the framework of the chromodielectric soliton model (CDM). Here, the long-range parts of the nonabelian gluon self-interactions are assumed to give rise to a color-dielectric function which is parameterized in terms of an effective scalar background field. The six-quark system is confined in a deformed mean field through an effective nonlinear interac...

I outline various derivations of the non-Abelian Kubo equation, which governs the response of a quark-gluon plasma to hard thermal perturbations. In the static case, it is proven that gauge theories do not support hard thermal solitons. Explicit solutions are constructed within an SU (2) Ansatz and they are shown to support the general result. The time-dependent problem, i.e., non-Abelian plasm...

We investigate the interaction between a heavy quark-antiquark pair in color octet configuration gluon plasma. calculate nonperturbatively an effective thermal potential for such through study of correlation function hybrid state with $Q \bar{Q}$ and adjoint source static limit. discuss extraction potential, present results plasma moderately high temperatures $\lesssim 2 T_c$. The implications ...

We study within the light-cone path integral approach [3] the effect of the induced gluon radiation on high-pT hadrons in high-energy heavy-ion collisions. The induced gluon spectrum is represented in a new form which is convenient for numerical simulations. For the first time computations are performed with a realistic parametrization of the dipole cross section. The results are in reasonable ...

The structure of hadrons consisting of three static color sources in fundamental (baryons) or adjoint (three-gluon glueballs) representations is studied. The static potentials of glueballs as well as gluon field distributions in glueballs and baryons are calculated in the framework of field correlator method. 1. The study of the gluon field structure in hadrons is important for the deep underst...

Penetrating probes in heavy-ion collisions, like jets and photons, are sensitive to the transport coefficients of produced quark-gluon plasma, such as shear bulk viscosity. Quantifying this sensitivity requires a detailed understanding photon emission jet-medium interaction nonequilibrium plasma during hydrodynamic stages collisions. Up now, an has been hindered by instabilities. These instabil...