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Tipo de Documento:	Artigo
Título :	Dynamical symmetry restoration for a higher-derivative four-fermion model in an external electromagnetic field
Autor :	Elizalde, E. Gavrilov, Serguei Odintsov, S. D. Shil'nov, Yu. I.
Fecha de publicación :	2000
Resumen:	A four-fermion model with additional higher-derivative terms is investigated in an external electromagnetic field. The effective potential in the leading order of large-N expansion is calculated in external constant magnetic and electric fields. It is shown that, in contrast to the former results concerning the universal character of "magnetic catalysis" in dynamical symmetry breaking, in the present higher-derivative model the magnetic field restores chiral symmetry broken initially on the tree level. Numerical results describing a second-order phase transition that accompanies the symmetry restoration at the quantum level are presented.
Palabras clave :	Magnetic field Broken symmetry Finite-temperature Electromagnetic field Campo eletromagnético
ISSN :	0103-9733 1678-4448
Es parte de:	Brazilian Journal of Physics
Idioma :	eng
Institución / Editorial :	Sociedade Brasileira de Física
Citación :	ELIZALDE, E. et al. Dynamical symmetry restoration for a higher-derivative four-fermion model in an external electromagnetic field. Brazilian Journal of Physics, São Paulo, v. 30, n. 3, p. 573-580, set. 2000. Disponível em: https://www.scielo.br/j/bjp/a/ZtJvbZMVhStHsq5Jymwq9Cn/?format=pdf&lang=en. Acesso em: 15 out. 2024.
License:	Creative Commons Atribuição-NãoComercial 4.0 Internacional (CC BY-NC 4.0)
URI :	https://ri.ufs.br/jspui/handle/riufs/20277
Aparece en las colecciones:	DFI - Artigos de periódicos

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