Next Article in Journal
High-Precision Authentication Scheme Based on Matrix Encoding for AMBTC-Compressed Images
Previous Article in Journal
U-Dualities in Type II and M-Theory: A Covariant Approach
Open AccessArticle

The Standard Model of Particle Physics with Diracian Neutrino Sector

Institute for Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
Symmetry 2019, 11(8), 994; https://doi.org/10.3390/sym11080994
Received: 5 June 2019 / Revised: 25 July 2019 / Accepted: 26 July 2019 / Published: 3 August 2019
The minimally extended standard model of particle physics contains three right handed or sterile neutrinos, coupled to the active ones by a Dirac mass matrix and mutually by a Majorana mass matrix. In the pseudo-Dirac case, the Majorana terms are small and maximal mixing of active and sterile states occurs, which is generally excluded for solar neutrinos. In a “Diracian” limit, the physical masses become pairwise degenerate and the neutrinos attain a Dirac signature. Members of a pair do not oscillate mutually so that their mixing can be undone, and the standard neutrino model follows as a limit. While two Majorana phases become physical Dirac phases and three extra mass parameters occur, a better description of data is offered. Oscillation problems are worked out in vacuum and in matter. With lepton number –1 assigned to the sterile neutrinos, the model still violates lepton number conservation and allows very feeble neutrinoless double beta decay. It supports a sterile neutrino interpretation of Earth-traversing ultra high energy events detected by ANITA. View Full-Text
Keywords: standard model; sterile neutrinos; Majorana mass; pseudo Dirac neutrinos; ANITA standard model; sterile neutrinos; Majorana mass; pseudo Dirac neutrinos; ANITA
MDPI and ACS Style

Nieuwenhuizen, T.M. The Standard Model of Particle Physics with Diracian Neutrino Sector. Symmetry 2019, 11, 994.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop