Study of the Homogeneous Bethe-Salpeter Equation in the 2+1 Minkowski Space

Autor(es):Mostrar menos -

Gigante, Vitor ; Alvarenga Nogueira, Jorge H. ; Ydrefors, Emanuel ; Gutierrez, Cristian ; DosSantos, AL ; Vasconcellos, CAZ ; DaSilva, DT ; Hadjimichef, D ; Weber, F ; Machado, MVT ; DaSilva, MLL ; Xu, R ; Greiner, W

• Tipo de documento: Artigo Científico
• Fonte: PROCEEDINGS OF THE 7TH INTERNATIONAL WORKSHOP ON ASTRONOMY AND RELATIVISTIC ASTROPHYSICS (IWARA 2016); v. 45, p. 5-pg., 2017-01-01.

Resumo

The problem of a relativistic bound-state system consisting of two scalar bosons interacting through the exchange of another scalar boson, in 2+1 space-time dimensions, has been studied. The Bethe-Salpeter equation (BSE) was solved by adopting the Nakanishi integral representation (NIR) and the Light-Front projection. The NIR allows us to solve the BSE in Minkowski space, which is a big and important challenge, since most of non-perturbative calculations are done in Euclidean space, e.g. Lattice and Schwinger-Dyson calculations. We have in this work adopted an interaction kernel containing the ladder and cross-ladder exchanges. In order to check that the NIR is also a good representation in 2+1, the coupling constants and Wick-rotated amplitudes have been computed and compared with calculations performed in Euclidean space. Very good agreement between the calculations performed in the Minkowski and Euclidean spaces has been found. This is an important consistence test that allows Minkowski calculations with the Nakanishi representation in 2+1 dimensions. This relativistic approach will allow us to perform applications in condensed matter problems in a near future. (AU)

• Processo FAPESP: 14/19094-8 - Decaimentos de mésons pesados em três corpos e violação CP
• Beneficiário: Jorge Henrique de Alvarenga Nogueira
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto