Lorentz invariance violations in the interplay of quantum gravity with matter
ORAL
Abstract
We explore the interplay of matter with quantum gravity with a preferred frame to highlight that the matter sector cannot be protected from the symmetry-breaking effects in the gravitational sector. Focusing on Abelian gauge fields, we show that quantum gravitational radiative corrections induce Lorentz-invariance-violating couplings for the Abelian gauge field. In particular, we discuss how such a mechanism could result in the possibility to translate observational constraints on Lorentz violation in the matter sector into strong constraints on the Lorentz-violating gravitational couplings.
*This work is supported by the DFG under grant no.~Ei-1037/1, and A.~E.~is also partially supported by a visiting fellowship at the Perimeter Institute for Theoretical Physics. This research is also supported by the Danish National Research Foundation under grant DNRF:90. A.~P.~is supported by the Alexander von Humboldt Foundation and M.~S.~is supported by a scholarship of the German Academic Scholarship Foundation. A.~E.~would like to acknowledge the contribution of the COST Action CA18108: QG-MM (Quantum Gravity phenomenology in the Multi-Messenger approach). M.S.~gratefully acknowledges the hospitality at CP3-Origins during the final stages of this work.
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