The box diagram in Yukawa theory

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We present a light-front calculation of the box diagram in Yukawa theory. The covariant box diagram is finite for the case of spin-1/2 constituents exchanging spin-0 particles. In light-front dynamics, however, individual time-ordered diagrams are divergent. We analyze the corresponding light-front singularities and show the equivalence between the light-front and covariant results by taming the singularities.
21 pages, 17 figures. submittes to Phys. Rev. D

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High Energy Physics - Theory, Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/196345

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-th/0610309
 http://arxiv.org/abs/hep-th/0610309
 Phys.Rev.D75:065010,2007
 doi:10.1103/PhysRevD.75.065010

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arXiv