Universal effective action for O(n)-symmetric ����^4 model from renormalization group
| Autor: | Sokolov, A. I., Orlov, E. V., Ul'kov, V. A., Kashtanov, S. S. |
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| Rok vydání: | 1998 |
| Předmět: | |
| DOI: | 10.48550/arxiv.hep-th/9808011 |
| Popis: | The RG expansions for renormalized coupling constants g_6 and g_8 of the 3D n-vector model are calculated in the 4-loop and 3-loop approximations respectively. Resummation of the RG series for g_6 by the Pade-Borel-Leroy technique results in the estimates for its universal critical values g_6^*(n) which are argued to deviate from the exact numbers by less than 0.3%. The RG expansion for g_8 demonstrates stronger divergence being much less suitable for getting reliable numerical estimates. 5 pages, LaTeX, no figures, reported at the XI Intern. Conf. "Problems of Quantum Field Theory" (July 13-17, 1998, Dubna, Russia), submitted to the Conference Proceedings |
| Databáze: | OpenAIRE |
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