Clockwork Neutrinogenesis: Baryogenesis from theory space

Abstract

We propose a minimal clockwork model to illustrate the possibility of baryogenesis via leptogenesis in a theory space setting. The standard lepton sector is augmented with three copies of a clockwork lattice made of SM neutral fermions. The two boundaries of these one-dimensional lattices are endowed with couplings to the SM leptons and three dark sector fermions, respectively. Small neutrino masses and a resonance enhanced Dirac leptogenesis are naturally obtained for anarchic textures of the Yukawa matrices, with $\sim \mathcal{O}(1)$ elements, provided the heavy clockwork fermions have masses $\gtrsim \mathcal{O}(10\text{mbox}TeV)$

Comments: 10 pages, 3 figures. Updated introduction and improved discussion on the model and methodology with added references. Fixed an error in the parameter counting. Results qualitatively unchanged. Version accepted in Physics Letters B