79 citations · 519 across the 31 of their papers we have counts for
31 papers
The boundary of the gravitational Standard-Model Extension
Carlos M. Reyes, Marco Schreck
A modification of General Relativity that is based on the gravitational Standard-Model Extension and incorporates nondynamical background fields has recently been studied via the A…
Perturbative S-matrix unitarity and higher-order Lorentz violation
Justo López-Sarrión, Carlos M. Reyes, César Riquelme
We investigate the preservation of unitarity in a Lorentz and CPT-violating QED model containing higher-order operators. In particular, we consider modifications in the fermion sec…
The ADM Formulation of the SME Gravity
Carlos M. Reyes
The Hamiltonian formulation of the gravitational sector of the Standard-Model Extension (SME) with nondynamical fields and is studied. We provide the relevant Hamilton…
Tree-level unitarity, causality and higher-order Lorentz and CPT violation
Justo Lopez-Sarrion, Carlos M. Reyes, Cesar Riquelme
Higher-order effects of CPT and Lorentz violation within the SME effective framework including Myers-Pospelov dimension-five operator terms are studied. The model is canonically qu…
Cosmology in the presence of diffeomorphism-violating, nondynamical background fields
Carlos M. Reyes, Marco Schreck, Alex Soto
We consider diffeomorphism violation, which is parameterized by nondynamical background fields of the gravitational Standard-Model Extension (SME), and study its effects on the tim…
Modified-gravity theories with nondynamical background fields
Carlos M. Reyes, Marco Schreck
We study the dynamics of a modified-gravity theory, which is supplemented by an extended Gibbons-Hawking-York boundary term and incorporates diffeomorphism violation through nondyn…