E ective eld theory has shown to be a powerful method in searching for quantum gravity e ects and in particular for CPT and Lorentz symmetry violation. In this work we study an e ective eld theory with higher-order Lorentz ...

This paper is dedicated to the study of interactions between external sources for the electromagnetic field in a model which exhibits Lorentz-symmetry breaking. We investigate such interactions in the CPT-even photon sector ...

We study perturbative unitarity in the scalar sector of the Myers-Pospelov model. The model introduces a preferred four-vector n which breaks Lorentz symmetry and couples to a five-dimension operator. When the preferred ...

In this work we group four research topics apparently disconnected, namely solitons, Lorentz symmetry breaking, super-symmetry, and entropy. Following a recent work (Gleiser and Stamatopoulos, 2012), we show that it is ...

This paper is dedicated to the study of interactions between stationary field sources for the linearized unimodular gravity or the Weyl plus transverse diffeomorphism (WTDIFF) theory in a model that exhibits Lorentz-symmetry ...

We work on some general extensions of the formalism for theories which preserve the relativity of inertial frames with a nonlinear action of the Lorentz transformations on momentum space. Relativistic particle models ...