Induced CP-violation in the Euler-Heisenberg Lagrangian

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorGhasemkhani, M.-
Autor(es): dc.creatorRahmanpour, V.-
Autor(es): dc.creatorBufalo, R.-
Autor(es): dc.creatorMnatsakanova, M. N.-
Autor(es): dc.creatorSoto, A.-
Data de aceite: dc.date.accessioned2026-02-09T12:45:45Z-
Data de disponibilização: dc.date.available2026-02-09T12:45:45Z-
Data de envio: dc.date.issued2023-07-07-
Data de envio: dc.date.issued2023-07-07-
Data de envio: dc.date.issued2022-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/58084-
Fonte completa do material: dc.identifierhttps://link.springer.com/article/10.1140/epjc/s10052-022-11145-8-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1167771-
Descrição: dc.descriptionIn this paper, we examine the behaviour of the Euler–Heisenberg effective action in the presence of a novel axial coupling among the gauge field and the fermionic matter. This axial coupling is responsible to induce a CP-violating term in the extended form of the Euler–Heisenberg effective action, which is generated naturally through the analysis of the box diagram. However, this anomalous model is not a viable extension of QED, and we explicitly show that the induced CP-violating term in the Euler–Heisenberg effective Lagrangian is obtained only by adding an axial coupling to the ordinary QED Lagrangian. In order to perform our analysis, we use a parametrization of the vector and axial coupling constants, gv and ga , in terms of a new coupling β . Interestingly, this parametrization allows us to explore a hidden symmetry under the change of gv↔ga in some diagrams. This symmetry is explicitly observed in the analysis of the box diagram, where we determine the λi coefficients of LEHext.=λ1F2+λ2G2+λ3FG , specially the coefficient λ3 related with the CP-violating term due to the axial coupling. As a phenomenological application of the results, we compute the relevant cross section for the light by light scattering through the extended Euler–Heisenberg effective action.-
Idioma: dc.languageen-
Publicador: dc.publisherSpringer-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceThe European Physical Journal C-
Palavras-chave: dc.subjectEuler-Heisenberg-
Título: dc.titleInduced CP-violation in the Euler-Heisenberg Lagrangian-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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