Tuesday, May 21, 2013

1305.4155 (M. A. L. Capri et al.)

SU(2) x U(1) Yang-Mills theories in 3d with Higgs field and Gribov
ambiguity
   [PDF]

M. A. L. Capri, D. Dudal, M. S. Guimaraes, I. F. Justo, S. P. Sorella, D. Vercauteren
We study the structure of the gauge propagators of a 3d version of the electroweak interaction in terms of the Higgs vacuum expectation value nu, of the non-Abelian gauge coupling g, and of the Abelian gauge coupling g', when nonperturbative effects related to the non-Abelian gauge fixing are introduced by means of an adapted path integral measure. In the perturbative regime of small non-Abelian coupling g and sufficiently large nu, the well-known standard Z and W propagators are recovered, together with a massless photon. In general, depending on the relative magnitudes of g, g' and nu, we uncover a quite different propagator structure. In a later stage of research, the results here derived can be used to study the associated phase diagram in more depth.
View original: http://arxiv.org/abs/1305.4155

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