Electron-electron interaction in a MCS model with a purely spacelike Lorentz-violating background

Details Electron-electron interaction in a MCS model with a purely spacelike Lorentz-violating background Electron-electron interaction in a MCS model with a purely spacelike Lorentz-violating background

2004-09-30

arxiv.org/abs/hep-th/0409310v2

Phys.Rev. D71 (2005) 045003

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, 3 figures, Revtex4 style, figures revised; to appear in Phys. Rev. D (2005)

Scientific paper

10.1103/PhysRevD.71.045003

One considers a planar Maxwell-Chern-Simons electrodynamics in the presence of a purely spacelike Lorentz-violating background. Once the Dirac sector is properly introduced and coupled to the scalar and the gauge fields, the electron-electron interaction is evaluated as the Fourier transform of the Moller scattering amplitude (derived in the non-relativistic limit). The associated Fourier integrations can not be exactly carried out, but an algebraic solution for the interaction potential is obtained in leading order in (v/s)^2. It is then observed that the scalar potential presents a logarithmic attractive (repulsive) behavior near (far from) the origin. Concerning the gauge potential, it is composed of the pure MCS interaction corrected by background contributions, also responsible for its anisotropic character. It is also verified that such corrections may turn the gauge potential attractive for some parameter values. Such attractiveness remains even in the presence of the centrifugal barrier and gauge invariant A.A term, which constitutes a condition compatible with the formation of Cooper pairs.

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