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Perturbative unitarity and higher-order Lorentz symmetry breaking
(2018)
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 ...
Atomic Collapse In Graphene: Lost Of Unitarity
(2016)
We explore the problem of atomic collapse in graphene due to monopole impurities, both electric and magnetic, within the context of supersymmetric quantum mechanics. For electric impurities, upon factorizing the radial ...
Unitarity in a Lorentz symmetry breaking model with higher-order operators
(2014)
We analyze the unitarity of a modified QED with higher-order terms that violate Lorentz symmetry. We make an explicit calculation to verify unitarity at the one-loop level. As expected we find negative-norm states that ...
Unitarity and Lee-Wick prescription at one loop level in the effective Myers-Pospelov electrodynamics: The e(+) + e(+) annihilation
(2017)
We study perturbative unitarity in a Lorentz-symmetry-violating QED model with higher-order derivative operators in the light of the results of Lee and Wick to preserve unitarity in indefinite metric theories. Specifically, ...