ONE-FERMION-LOOP CONTRIBUTION TO THE ENERGY OF THE NEUTRAL PION CONDENSATE IN THE SIGMA-MODEL

被引：12

作者：

BRONIOWSKI, W

KUTSCHERA, M

机构：

[1] H. Niewodniczański Nuclear Physics Institute, PL-31 342 Cracow

来源：

PHYSICS LETTERS B | 1990年 / 234卷 / 04期

关键词：

D O I：

10.1016/0370-2693(90)92037-J

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The one-fermion loop contribution to the energy of the neutral pion condensate in the Gell-Mann-Lévy σ-model is calculated analytically. Two methods are applied: explicit summation over the Dirac spectrum, and a perturbative method, whose convergence properties are studied quantitatively. Vacuum instability of the theory is found, in agreement with earlier results for solitons in the σ-model. © 1990.

引用

页码：449 / 454

页数：6

共 28 条

[1] DERIVATIVE EXPANSIONS OF FERMION DETERMINANTS - ANOMALY-INDUCED VERTICES, GOLDSTONE-WILCZEK CURRENTS, AND SKYRME TERMS [J].