Dark matter and leptogenesis linked by classical scale invariance

Khoze, Valentin V.; Plascencia, Alexis D.

Abstract

In this work we study a classically scale invariant extension of the Standard Model that can explain simultaneously dark matter and the baryon asymmetry in the universe. In our set-up we introduce a dark sector, namely a non-Abelian SU(2) hidden sector coupled to the SM via the Higgs portal, and a singlet sector responsible for generating Majorana masses for three right-handed sterile neutrinos. The gauge bosons of the dark sector are mass-degenerate and stable, and this makes them suitable as dark matter candidates. Our model also accounts for the matter-anti-matter asymmetry. The lepton flavour asymmetry is produced during CP-violating oscillations of the GeV-scale right-handed neutrinos, and converted to the baryon asymmetry by the electroweak sphalerons. All the characteristic scales in the model: the electro-weak, dark matter and the leptogenesis/neutrino mass scales, are generated radiatively, have a common origin and related to each other via scalar field couplings in perturbation theory.

Citation

Khoze, V. V., & Plascencia, A. D. (2016). Dark matter and leptogenesis linked by classical scale invariance. Journal of High Energy Physics, 2016(11), Article 025. https://doi.org/10.1007/jhep11%282016%29025

• Journal Article Type: Article
• Acceptance Date: Oct 9, 2016
• Online Publication Date: Nov 7, 2016
• Publication Date: Nov 7, 2016
• Deposit Date: Dec 5, 2016
• Publicly Available Date: Dec 6, 2016
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2016
• Issue: 11
• Article Number: 025
• DOI: https://doi.org/10.1007/jhep11%282016%29025
• Public URL: https://durham-repository.worktribe.com/output/1399065
• Related Public URLs: https://arxiv.org/pdf/1605.06834.pdf