caa a22 4500 467910618 CHVBK 20180406152848.0 cr unu---uuuuu 170328e20060201xx s 000 0 eng 10.1007/s11232-006-0020-x doi (NATIONALLICENCE)springer-10.1007/s11232-006-0020-x Instanton in the Field of a Pointlike Source of a Euclidean Non-Abelian Field [Elektronische Daten] [G. Zinovjev, S. Molodtsov] We consider the behavior of an (anti)instanton in the field of a pointlike source of a Euclidean non-Abelian field and investigate (anti)instanton deformations described by variations of its characteristic parameters. We formulate the variational problem of seeking the corresponding "crumpled” topological configurations and solve it algebraically using the Ritz method (of multipole decomposition of deformation fields). We investigate the domain of parameters specific for the instanton liquid model. We propose a simple method of taking contributions of such configurations in the functional integral into account approximately. In the framework of superposition analysis, we obtain an estimate for the mean energy of the source in the instanton liquid, and the estimate increases linearly with distance. In the case of a dipole in the color-singlet state, the energy is a linear function of the distance between the sources with the "strength” coefficient agreeing well with the known model and lattice estimates. Springer Science+Business Media, Inc., 2006 instanton nationallicence external field nationallicence approximate solution nationallicence deformations nationallicence Zinovjev G. Bogoliubov Institute for Theoretical Physics, Ukrainian Academy of Sciences, Kiev, Ukraine aut Molodtsov S. Institute for Theoretical and Experimental Physics, Moscow, Russia aut Theoretical and Mathematical Physics Kluwer Academic Publishers-Consultants Bureau 146/2(2006-02-01), 221-247 0040-5779 146:2<221 2006 146 11232 https://doi.org/10.1007/s11232-006-0020-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11232-006-0020-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zinovjev G. Bogoliubov Institute for Theoretical Physics, Ukrainian Academy of Sciences, Kiev, Ukraine aut NATIONALLICENCE 700 1- Molodtsov S. Institute for Theoretical and Experimental Physics, Moscow, Russia aut NATIONALLICENCE 773 0- Theoretical and Mathematical Physics Kluwer Academic Publishers-Consultants Bureau 146/2(2006-02-01), 221-247 0040-5779 146:2<221 2006 146 11232 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer