Coherent laser spectroscopy of ¯pHe+

The facilities of the coherent laser pulse spectroscopy of the ¯pHe⁺ transitions are considered taking the magnetic structure of the energy levels into account. The possibility for the observation of the dynamics of intramolecular motions is also analyzed.     

Projection Evolution of Quantum States—the Delayed Choice Puzzle

Physics of Atomic Nuclei - We discuss the problem of the time variable in the nearly standard formulation of the quantum mechanics. In order to be able to describe the outcome of some of the...     

New approach for numerical solution of configuration-space Faddeev equations

A new computational scheme for solving the bound state configuration-space Faddeev equations is applied. The scheme is based on the spline-approximation and the adiabatic limit of Faddeev equations. An ordering of variables being in agreement with the limit was chosen. As a result the matrix of the eigenvalue problem has a sparse block structure. Calculations of the bound states of µpp, µdd, µtt mesic molecules and ¯pdd, ¯ptt antiprotonic ones, were performed. To check the method, calculations of the binding energies for such systems as the positronium ion Ps_–,³H and³He were carried out. The results are compared with the best results of other authors.     

Cosmological production of vector bosons and cosmic microwave background radiation

An intensive cosmological production of vector W and Z bosons is considered within a cosmological model that involves a relative scale of measurement. Field-theory models are studied in which cosmic microwave background radiation and baryon matter may appear as products of the decay of such primordial bosons.     

Energy level scheme of ¯pHe+ system in generalized adiabatic approach

The energy level scheme of the states of the ¯pHe⁺ system is studied in the effective adiabatic approach which has been developed in our previous work. The possibilities for fitting the experimental data by means of an appropriate choice of effective potentials are discussed. Systematic calculations of the energy level system and their estimations are given.     

Adiabatic representation for a hydrogen atom photoionization in a uniform magnetic field

A new effective method of calculating wave functions of discrete and continuous spectra of a hydrogen atom in a strong magnetic field is developed on the basis of the adiabatic approach to parametric eigenvalue problems in spherical coordinates. The two-dimensional spectral problem for the Schrödinger equation at a fixed magnetic quantum number and parity is reduced to a spectral parametric problem for a one-dimensional angular equation and a finite set of ordinary second-order radial differential equations. The results are in good agreement with the photoionization calculations by other authors and have a true threshold behavior.     

Higher-order approximations to electron-atom ionization at high impact energy and near the Bethe ridge

Electron-atom ionization processes in the kinematics near the Bethe ridge at impact energies of ～1?keV are considered. Regularized plane wave higher-order Born approximations are analyzed in the case of electron-hydrogen ionization. A practical recipe for the higher-order Born calculations is formulated.     

Quantum Transparency of Barriers and Reflection from Wells for Clusters of Identical Particles

A method for solving the problem of quantum transmission through potential barriers or potential wells for a compound system consisting of several identical particles coupled via pair oscillator-type potentials in the oscillator representation of the symmetrized coordinates is considered. The efficiency of the proposed approach, algorithms and programs is demonstrated by the examples of calculation of complex energy values and analysis of metastable states of compound systems of two, three, and four identical particles on a straight line, which lead to the effect of quantum transparency of the potential barriers or quantum reflection from the wells.     

Study of nuclear density effects on secondary hadrons many-particle correlations

The data obtained by the bubble chambers and nuclear photoemulsion in the interval of energies from 4 up to 400 GeV have been analysed in the quasirapidity scale with the purpose of secondary hadrons' clasterisation study. The new method of the multiparticle correlations, independing on the energy, quasirapidity interval chosen and models, has been proposed in this work. It is shown that the density correlations of different signs in the analysed events are observed. Among their the events with maximal densities, in which the correlations factor does not differ from background beyond a double statistical error, are not observed. However are bumps at 400 GeV the values of which require an affimation.     

New effective adiabatic approach to the muonic three-body scattering problem

The effective adiabatic approach to analysis of the three-particle interaction is presented. It gives a possibility to represent even in a simple two-level approximation all qualitative peculiarities of mesic atomic resonance reactions and to obtain a good quantitative agreement with different cumbersome calculations.