Leptogenesis and composite heavy neutrinos with gauge-mediated interactions

Biondini, Simone; Panella, O. (2017). Leptogenesis and composite heavy neutrinos with gauge-mediated interactions. European physical journal. C - particles and fields, 77(9), p. 644. EDP Sciences 10.1140/epjc/s10052-017-5206-x

[img]
Preview
Text
10.1140-epjc-s10052-017-5206-x.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (779kB) | Preview

Leptogenesis is an appealing framework to account for the baryon asymmetry in the universe. To this end physics beyond the standard model is demanded. In this paper we investigate the possibility to attain successful lepto- genesis with composite Majorana neutrinos. We work in the framework of effective gauge-mediated and contact inter- actions without any reference to an underlying composite- ness theory. This approach is the one adopted in all current experimental searches for composite fermions at colliders. In the case of gauge-mediated interactions, we calculate the CP asymmetry in heavy composite neutrino decays. Both the direct and the indirect CP asymmetry are derived and reso- nant leptogenesis is also discussed. We find that the Sakharov conditions can be met and, for some choice of the parame- ters, the correct order of magnitude of the baryon asymmetry is reproduced.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Biondini, Simone

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

EDP Sciences

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

02 Nov 2017 14:56

Last Modified:

02 Nov 2017 14:56

Publisher DOI:

10.1140/epjc/s10052-017-5206-x

ArXiv ID:

1707.00844

BORIS DOI:

10.7892/boris.106410

URI:

https://boris.unibe.ch/id/eprint/106410

Actions (login required)

Edit item Edit item
Provide Feedback