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Titolo:
Thermodynamical Bathe Ansatz analysis in an SU(2) x U(1) symmetric sigma-model
Autore:
Balog, J; Forgacs, P;
Indirizzi:
Univ Tours, Lab Math & Phys Theor, F-37200 Tours, France Univ Tours Tours France F-37200 Math & Phys Theor, F-37200 Tours, France
Titolo Testata:
NUCLEAR PHYSICS B
fascicolo: 3, volume: 570, anno: 2000,
pagine: 655 - 684
SICI:
0550-3213(20000327)570:3<655:TBAAIA>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXACT MASS GAP; FIELD-THEORIES; 2 DIMENSIONS; SPIN; O(3);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Balog, J Univ Tours, Lab Math & Phys Theor, Parc Grandmont, F-37200 Tours,France Univ Tours Parc Grandmont Tours France F-37200 200 Tours, France
Citazione:
J. Balog e P. Forgacs, "Thermodynamical Bathe Ansatz analysis in an SU(2) x U(1) symmetric sigma-model", NUCL PHYS B, 570(3), 2000, pp. 655-684

Abstract

Four different types of free energies are computed by both thermodynamicalBethe Ansatz (TBA) techniques and by weak coupling perturbation theory in an integrable one-parameter deformation of the O(4) principal chiral sigma-model (with SU(2)X U(1) symmetry). The model exhibits both 'fermionic' and 'bosonic' type free energies and in all cases the perturbative and the TEA results are in perfect agreement, strongly supporting the correctness of the proposed S matrix, The mass gap is also computed in terms of the ii parameters of the modified minimal subtraction scheme and a lattice regularized version of the model, (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 07/07/20 alle ore 11:06:53