Recently (hep-ph/0109278), a modification A µ → B µ = (1 + µ∂ m)A µ for the gluon field A µ in the QCD Lagrangian (m = small gluon mass), yielded a k −4 behaviour for the gluon propagator, conventionally associated with linear confinement. This was prompted by a lack of consensus of results from other standard non-perturbative approaches on the T-dependence of gluon condensates in the cos-molog...

For the first time a rigorous quantum treatment of the LandauPomeranchuk-Migdal effect in QED and QCD is given. The rate of photon (gluon) radiation by an electron (quark) in medium is expressed through the Green’s function of a two-dimensional Schrödinger equation with an imaginary potential. In QED this potential is proportional to the dipole cross section for scattering of ee pair off an ato...

The cross section for the J/ψ and Υ interaction with light hadrons is calculated in short-distance QCD, based on the large heavy quark mass and the resulting large energy gap to open charm or beauty. The low energy form of the cross section is determined by the gluon structure functions at large x; hence it remains very small until quite high energies. This behaviour is experimentally confirmed...

In this work, we have used the QCD dynamic scenario of quark gluon interaction to investigate and study photon emission theoretically based on quantum theory. The theory is implemented by deriving rate equation state ideal QGP at a chemical potential. quark-gluon has be calculated for anti up-gluon in g → γ system temperature with critical ( 132.38, , 198.57) MeV energy GeV. We investigated sig...

PACS numbers: 13.85.Hd,13.60.Hb,13.85.Ni,24.85 In this paper we discuss the experimental signatures of the new form of nuclear matter – the Color Glass Condensate (CGC) in particle production at RHIC. Let us first see how the notion of the CGC arises in pA collisions at high energy. Consider a process of inclusive particle production in pA collisions in a nucleus rest frame. At high energies th...

We propose a symmetry breaking scheme for QCD with three massless quarks at high baryon density wherein the color and flavor SU(3)color×SU(3)L×SU(3)R symmetries are broken down to the diagonal subgroup SU(3)color+L+R by the formation of a condensate of quark Cooper pairs. We discuss general properties that follow from this hypothesis, including the existence of gaps for quark and gluon excitati...

Lightand strange-baryon spectra are studied in a relativistic potential model of independent quarks taking into account perturbatively the correction due to one-gluon-exchange interaction along with that due to Goldstone boson exchange interaction between the constituent quarks and that due to center-of-mass motion. The baryons are assumed here as an assembly of independent quarks confined in a...

Assuming a Gaussian approximation for the QCD gluodynamics, all the nonperturbative physics can be encoded into two parameters: the gluon correlation length Tg and the gluon condensate G2. These parameters are sufficient in order to describe the heavy-heavy quark nonperturbative interaction. In this work we adopt the same framework in order to study heavy-light bound states in the non-recoil li...

We propose a symmetry breaking scheme for QCD with three massless quarks at high baryon density wherein the color and avor SU(3)color SU(3)L SU(3)R symmetries are broken down to the diagonal subgroup SU(3)color+L+R by the formation of a condensate of quark Cooper pairs. We discuss general properties that follow from this hypothesis, including the existence of gaps for quark and gluon excitation...

An effective, low-energy, field theory of s-wave quarkonia, constituent heavy quarks, and gluons is constructed which is manifestly gauge invariant. The interaction Lagrangian has the form of a twist expansion, as typically encountered in hard processes, and involves derivatives of arbitrary order. The parameters in the interaction are related with the nonrelativistic wave function, and standar...