The role of the gravitational sector in the Lorentz-and CPT-violating standard-model
extension (SME) is studied. A framework is developed for addressing this topic in the context …

The pure-gravity sector of the minimal standard-model extension is studied in the limit of
Riemann spacetime. A method is developed to extract the modified Einstein field equations …

The fate of the Nambu-Goldstone modes arising from spontaneous Lorentz violation is
investigated. Using the vierbein formalism, it is shown that up to 10 Lorentz and …

A general formalism is presented for violations of Lorentz and CPT symmetry in the neutrino
sector. The effective Hamiltonian for neutrino propagation in the presence of Lorentz and …

Abstract Space-based experiments offer sensitivity to numerous unmeasured effects
involving Lorentz and CPT violation. We provide a classification of clock sensitivities and …

In this work, the thermodynamical behavior of massive and massless particles is analyzed
within loop quantum gravity formalism. A modified dispersion relation is investigated which …

This is an introductory review about the ongoing search for a signal of Lorentz Invariance
Violation (LIV) in cosmic rays. We first summarise basic aspects of cosmic rays, focusing on …

Abstract The Standard Model Extension (SME) provides the most general
observerindependent field theoretical framework for investigations of Lorentz violation. The …

The emission of electromagnetic radiation by charges moving uniformly in a Lorentz-
violating vacuum is studied. The analysis is performed within the classical Maxwell-Chern …

In the context of threshold investigations of Lorentz violation, we discuss the fundamental
principle of coordinate independence, the role of an effective dynamical framework, and the …