High-scale leptogenesis with three-loop neutrino mass generation and dark matter

• Published in: The journal of high energy physics Vol. 2017; no. 4; pp. 1 - 11
• Main Author: Gu, Pei-Hong
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-04-2017; Springer Nature B.V; SpringerOpen
• Subjects: Asymmetry; Beyond Standard Model; Classical and Quantum Gravitation; Cosmology of Theories beyond the SM; Dark matter; Decay; Elementary Particles; Fermions; High energy physics; Leptons; Neutrino Physics; Neutrinos; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum numbers; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Scalars; String Theory; Symmetry; Neutrino Physics; Beyond Standard Model; Cosmology of Theories beyond the SM
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP04(2017)159

A
bstract
We demonstrate a common origin for high-scale leptogenesis and three-loop neutrino mass generation. Specifically we extend the standard model by two real singlet scalars, two singly charged scalars carrying different quantum numbers under certain global symmetry and two or more singlet fermions with Majorana masses. This global symmetry is only allowed to be softly or spontaneously broken. Our model also respects an exactly conserved
Z
2
discrete symmetry. Through the real scalar decays and then the charged scalar decays, we can obtain a lepton asymmetry stored in the standard model leptons. This lepton asymmetry can be partially converted to a baryon asymmetry by the sphaleron processes. The interactions for this leptogenesis can also result in a three-loop diagram to generate the neutrino masses. The lightest singlet fermion can keep stable to serve as a dark matter particle.