Sum rules for spin asymmetries

Starting from rotational invariance we derive sum rules for the single-spin asymmetries in inclusive production and binary processes. We also get sum rules for spin correlation parameters in elastic pp-scattering.Comment: 4 page

Mechanism of single-spin asymmetries generation in the inclusive hadron processes

We discuss a nonperturbative mechanism for generation of the single-spin asymmetries in hadron interactions. It is based on the chiral quark model combined with unitarity and impact parameter picture and provides explanation for the experimental regularities observed under the measurements of the spin asymmetries.Comment: 20 pages, 7 figure

On asymmetry in inclusive pion production

On the basis of the mechanism proposed for one-spin asymmetries in inclusive hadron production we specify an $x$--dependence of asymmetries in inclusive processes of pion production. The main role in generation of this asymmetry belongs to the orbital angular momentum ofquark-antiquark cloud in internal structure of constituent quarks. The $x$--dependence of asymmetries in the charged pion production at large $x$ reflects the corresponding dependence of constituent quark polarization in the polarized proton.Comment: LaTeX, 8 pages, 3 figures. One figure added, as it appears in Phys. Rev.

Novel features of diffraction at the LHC

Interest and problems in the studies of diffraction at LHC are highlighted. Predictions for the global characteristics of proton-proton interactions at the LHC energy are given. Potential discoveries of the antishadow scattering mode and diffractive scattering conjugated with high--$E_T$ jets are discussed.Comment: 10 pages, 7 figures, journal version, 1 figure added, extended introductio

Different behaviour of the spin structure functions g1(x)g_1(x) and h1(x)h_1(x) at x→0x\to 0

We consider low-$x$ behaviour of the spin structure functions $g_1(x)$ and $h_1(x)$ in the unitarized chiral quark model which combines ideas on the constituent quark structure of hadrons with a geometrical scattering picture and unitarity. A nondiffractive singular low-$x$ dependence of $g^p_1(x)$ and $g_1^n(x)$ indicated by the recent SMC experimental data is described. A diffractive type smooth behaviour of $h_1(x)$ is predicted at small $x$. The expectations for the double-spin asymmetries in the low-mass Drell-Yan production at RHIC in the central region are discussed alongside.Comment: LaTeX, 10 pages, 2 figure

Hyperon Polarization in the Constituent Quark Model

We consider mechanism for hyperon polarization in inclusive production. The main role belongs to the orbital angular momentum and polarization of the strange quark-antiquark pairs in the internal structure of the constituent quarks. We consider a nucleon as a core consisting of the constituent quarks embedded into quark condensate. The nonperturbative hadron structure is based on the results of chiral quark models.Comment: 14 pages, LaTeX, 2 Figures, References adde

ENSURING ECONOMIC SECURITY OF RUSSIA IN THE CONTEXT OF AFRICAN DEVELOPMENT TRENDS: PROBLEMS AND PROSPECTS

Abstract Purpose: A new scientific problem is posed and substantiated: the need to take into account the African economic development trends in the system of ensuring the economic security of Russia. In this context, in order to assess the security of the national economy and the competitive position of Russia, the results of scientific studies of the main development trends and threats in Africa, the position of various countries on the African continent are analyzed. Methodology: The authors are based on the analysis of current scientific literature, government official documents, and statistical reports. The main methods of research are analytical review, comparison, systematic approach, cultural and civilizational approach. Result: The article substantiates the position that taking into account the development trends of the African continent is an important component in the system of assessing the national economic security of Russia in the current period and in the future, ensuring competitiveness and strengthening the economic sovereignty of Russia, analyzing the potential of interaction with African countries in the management practice. Applications: This research can be used for the universities, teachers and education students. Novelty/Originality: The authors formulate the main directions of the activation of scientific research and concentration of practical efforts to improve the national economic security of Russia in the context of the development trend of the African continent

СКАЛЯРИЗАЦИЯ ВЕКТОРНЫХ ПРЕДПОЧТЕНИЙ: ПРЕОДОЛЕНИЕ ПРИМИТИВИЗАЦИИ

It considers the drawbacks of the method for a scalar function preferences defined in a vector space on the basis of additive form and coefficients of importance. The advantages of the approaches based on the use of utility functions, replacement rates, pairwise comparison of indicators are discussed. Proposed ways of levelling shortcomings of the method of pairwise comparisons. As an alternative approach proposed target approach to the definition of the functions of preferences on the basis of the description of the physical effects of the system's functioning and use of criteria for substitution. Target approach considered on the example of the use of the entropy measures to assess the quality of surveillance. The hypothesis about the possibilities of cataloguing the main systems and development models scalarizаtion vector preferences using a targeted approach.Рассмотрены недостатки метода построения скалярной функции предпочтения, определенной в векторном пространстве, на основе аддитивной формы и коэффициентов важности. Показаны преимущества подходов, основанных на использовании функций полезности, коэффициентов замещения, попарного сравнения показателей. Приведены способы нивелирования недостатков метода попарного сравнения. В качестве альтернативного подхода предложен целевой подход к определению функции предпочтения на основе описания физических эффектов функционирования системы и использования критериев-заместителей. Целевой подход рассмотрен на примере использования энтропийной меры для оценки качества средств наблюдения. Выдвинута гипотеза о возможности каталогизации основных систем и разработки типовых моделей скаляризации векторных предпочтений с использованием целевого подхода