Charged gravitational instantons: extra CP violation and charge quantisation in the Standard Model

Abstract

We argue that quantum electrodynamics combined with quantum gravity results in a new source of CP violation, anomalous non-conservation of chiral charge and quantisation of electric charge. Further phenomenological and cosmological implications of this observation are briefly discussed within the standard model of particle physics and cosmology

arXiv commentv2: reference added

References in corpus (2)

• Small neutrino masses from gravitational $\theta$-term
• Semiclassical Gravity and Invisible Axions

Cited by in corpus (4)

• Gauge and gravitational instantons: From 3-forms and fermions to Weak Gravity and flat axion potentials
• Coloured gravitational instantons, the strong CP problem and the companion axion solution
• Parity from gauge symmetry
• Cosmology of the companion-axion model: dark matter, gravitational waves, and primordial black holes