Physics

1995, Special Issue

E.K. Bashkirov

STEADY SQUEEZED STATES IN POLARITON MODEL

The initial conditions corresponding to the stationary evolution of the photon and phonon sub¬systems in polariton model of the ionic crystal have been obtained. On their basis the possibility of steady squeezed states generation for electromagnetic and phonon fields has been established. The estimation of the squeezing factors of the boson fields has been carried out.

A.V. Gorohov, E.V. Rogacheva

COHERENT STATES ON SUPERGROUP OSp(2|2) AND PATH INTEGRALS FOR THE TWOLEVEL ATOM MODELS

The path integral in the coherent states representation of OSp(2|2) supergroup - the supergroup of dynamical symmetry of twolevel atom, interacting with single mode of electromagnetic field, is constructed. The semiclassical equations descriptive of the exact quantum dynamics in the case of supersymmetrical models are derived. The probabilities between the atomic levels using these equations solutions are calculated.

A.P. Maptynenko, V.A. Saleev, V.O. Galkin, R.N. Faustov

HEAVY BARYONS IN THE QUASIPOTENTIAL QUARK MODEL

On the basis of relativistic quasipotential model we have calculated the mass spectrum of the baryons with two heavy quarks in the quark-diquark approximation. We have obtained the inter¬action quasipotentials in the systems: quark-quark, quark-scalar diquark, quark-vector diquark. The masses of the ground state baryons with were calculated..

A.F. Krutov, V.E. Troitskii

ELECTROWEAK MESONS DECAYS IN THE RELATIVISTIC CONSTITUENT QUARK MODEL

Leptonic decays constants of pseudoscalar mesons are calculated in the framework of instant form of relativistic quantum mechanics. Results for pion and kaon agree well with experiments.

V.A. Saleev

PHOTON STRUCTURE FUNCTION AND CHARM PHOTOPRODUCTION AT HIGH ENERGIES

The charm quark photoproduction at large transverse momentum in the resolved photon inter­ action via partonic subprocess cg—>cg is studied. It is shown that at HERA energies the contribution of the charm quark excitation in the photon in the inclusive charm production at p > 5 GeV/c dominates over the other resolved photon contribution via the gluon content of the photon and it is about 50% of the contribution of the cc-pair production via the leading order photon-gluon fusion mechanism.