Study of the effective pair interatomic interaction in a Co-Ni melt in terms of the Wills-Harrison model

The dependence of the effective partial Wills-Harrison pair potentials in the equiatomic Co-Ni melt near the melting temperature on the probability of the existence of both diagonal and nondiagonal (in magnetic quantum number) overlappings of d electrons located at different atoms in the molten metal is analyzed. © 2013 Pleiades Publishing, Ltd

MSSM-inspired multifield inflation

Despite the fact that experimentally with a high degree of statistical significance only a single Standard Model--like Higgs boson is discovered at the LHC, extended Higgs sectors with multiple scalar fields not excluded by combined fits of the data are more preferable theoretically for internally consistent realistic models of particle physics. We analyze the inflationary scenarios which could be induced by the two-Higgs doublet potential of the Minimal Supersymmetric Standard Model (MSSM) where five scalar fields have nonminimal couplings to gravity. Observables following from such MSSM-inspired multifield inflation are calculated and a number of consistent inflationary scenarios are constructed. Cosmological evolution with different initial conditions for the multifield system leads to consequences fully compatible with observational data on the spectral index and the tensor-to-scalar ratio. It is demonstrated that the strong coupling approximation is precise enough to describe such inflationary scenarios.Comment: 27 pages, 4 figures, 5 tables. Version to appear in JHEP. Additions made to the text of the Introduction dealing with the issues of conformity of this multifield model and models of N=1 supergravity (pages 2-3). Added new inflationary scenarios, which are an artifact of such analysis (pages 11-12, Tables 1-4). Additional comments on page 9 and page 13. New references adde

Calculation of thermodynamic properties of liquid alkali metals by the first-principle-pseudopotential and Weeks-Chandler-Andersen methods

A study was conducted to demonstrate calculation of thermodynamic properties of liquid alkali metals by the first-principle-pseudo-potential and Weeks Chandler Andersen (WCA) methods. The pseudo-potential was used for calculating the thermodynamic properties of liquid alkali metals within the framework of the variational method. The use of the true wave functions of conduction electrons also enabled to take into account correctly the energy shifts for the core electrons caused by their interaction with the potential formed by the distribution of the conduction-electron charge. The results of calculations by the WCA method agreed well with the experimental data. This agreement for Li and Na was better than that in the case of using the variational method

The Variational Calculation of Bulk Moduli for Liquid Binary Alloys of Alkali Metals

The bulk moduli of the Na-K, Na-Cs, and K-Rb liquid equiatomic alloys at T=373 K are calculated by the variational method with the hard-sphere reference system. The local Animalu-Heine model pseudopotential and Toigo-Woodruff exchange-correlation function are used for the calculation. A good agreement with experimental data is achieved

The SW-MSA Calculation of Self-Diffusion Coefficients in Liquid Lithium and Rubidium

Successfully used recently for liquid Na and K the approach combined the linear trajectory approximation with the square-well model in the semi-analytical representation of the mean spherical approximation to calculate the self-diffusion coefficients is applied here to liquid Li and Rb. As well as earlier for Na and K, the results obtained are found to be in reasonable agreement with the available experimental data and confirm previous conclusion that the square-well model within the mean spherical approximation is quite useful for description of diffusion properties in liquid alkali metals

CompHEP-PYTHIA interface: integrated package for the collision events generation based on exact matrix elements

CompHEP, as a partonic event generator, and PYTHIA, as a generator of final states of detectable objects, are interfaced. Thus, integrated tool is proposed for simulation of (almost) arbitrary collision processes at the level of detectable particles. Exact (multiparticle) matrix elements, convolution with structure functions, decays, partons hadronization and (optionally) parton shower evolution are basic stages of calculations. The PEVLIB library of event generators for LHC processes is described.Comment: Standard LaTeX, 4 pages. To appear in the proceedings of the Seventh International Workshop on Advanced Computing and Analysis Technics in Physics Research (ACAT2000, Fermilab, October 16-20, 2000