Physics

2006, No. 6/1

E.K. Bashkirov, E.V. Garanova

QUANTUM THEORY OF SUPERRADIANCE. II

The quantum theory of superradiance in the three-level systems with coherent pump is considered. The effect of pumping pulse on superradiance parameters is studied.

V.A. Saleev, A.V. Shipilova

J/ψ PHOTOPRODUCTION VIA FRAGMENTATION IN THE QUASI-MULTI-REGGE KINEMATICS APPROACH

We study J/ψ photoproduction via the fusion and fragmentation mechanisms at the HERA Collider within the frameworks of the collinear parton model and the quasi-multi-Regge kinematics approach using the factorization formalism of nonrelativistic QCD at leading order in the strong coupling constant α_s and the relative velocity v of the bound quarks.

T.E. Pakhomova, P.O. Bogdanovich

INVESTIGATION OF ACCURACY OF SPECTRAL CHARACTERISTICS DEPENDING ON QUANTITY OF CORRECTION CONFIGURATIONS

Accuracy of obtained spectral characteristics depending on quantity of used basis of correction configurations for various ions isoelectronic sequences of oxygen is investigated. The first raised configurations are considered as the basic, and. In calculation of spectral characteristics the account of interaction of configurations by basis transformed radial orbitals with the varied parameter is taken.The admixed configurations are selected according to their influence evaluated in the second order of perturbation theory.