A system of two static quarks, at fixed distances r, and two light quarks is studied on an anisotropic lattice. Excitations by operators emphasizing quark or gluon degrees of freedom are examined. The maximum entropy method is applied in the spectral analysis. These simulations ultimately aim at learning about mechanisms of hadronic interaction.

A straightforward calculation reveals the essentially nonlocal character of the leading heavy QQ̄ interaction arising from nonperturbative gluon field correlations in the model of a fluctuating QCD vacuum. In light of this quarkonium spin splitting ratio predictions which have supported the scalar confinement ansatz are reconsidered as a specific example of possible consequences for spectroscopy.

It is shown that the quark–gluon interaction induced by instan-tons leads to the quark anomalous chromomagnetic moment. In the instanton-liquid model for the QCD vacuum, the chromomagnetic moment is µ a = − πf 2αs , where f is the packing fraction of instantons in the vacuum.

Final-state interaction phase difference in J/ψ → ρη and ωη decays Abstract It is shown that the study of the ω − ρ 0 interference pattern in the J/ψ → (ρ 0 + ω)η → π + π − η decay provides evidence for the large (nearly 90 •) relative phase between the one-photon and the three-gluon decay amplitudes.

The determination of magnitudes of basic parameters of the high energy elastic scattering amplitude are examined at small momentum transfers with taking account of the Coulomb-hadron interference effects. An actual problem of the modern elementary particles physics, the research of strong interaction processes at large distances and high energies, is considered in the framework of different app...

A system of two static quarks, at fixed distances r, and two light quarks is studied on an anisotropic lattice. Excitations by operators emphasizing quark or gluon degrees of freedom are examined. The maximum entropy method is applied in the spectral analysis. These simulations ultimately aim at learning about mechanisms of hadronic interaction.

It is shown that the quark–gluon interaction induced by instan-tons leads to the quark anomalous chromomagnetic moment. In the instanton-liquid model for the QCD vacuum, the chromomagnetic moment is µ a = − πf 2αs , where f is the packing fraction of instantons in the vacuum.

We examine the phenomena of chromomagnetic gluon condensation in Yang-Mills theory and problem stability vacuum fields. The apparent instability fields is a result quadratic approximation. restored when nonlinear interaction negative/unstable modes taken into account case zero (anti)self-dual covariantly-constant All these are stable indicate that highly degenerate quantum state.

Jets and photons could play an important role in finding the transport coefficients of quark-gluon plasma. To this end we analyze their interaction with a non-equilibrium Using new field-theoretical tools derive two-point correlators for plasma which show how instabilities evolve time. This allows us, first time, to finite rates medium. We furthermore that coherent, long-wavelength instability ...