Bolton, Patrick D;
Deppisch, Frank F;
Rai, Mudit;
Zhang, Zhong;
(2025)
Probing the nature of Heavy Neutral Leptons in direct searches and neutrinoless double beta decay.
Nuclear Physics B
, 1010
, Article 116785. 10.1016/j.nuclphysb.2024.116785.
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Abstract
Heavy Neutral Leptons (HNLs) are a popular extension of the Standard Model to explain the lightness of neutrino masses and the matter-antimatter asymmetry through leptogenesis. Future direct searches, such as fixed target setups like DUNE, and neutrinoless double beta decay are both expected to probe the regime of active-sterile neutrino mixing in a standard Seesaw scenario of neutrino mass generation for HNL masses around m<inf>N</inf>≲1 GeV. Motivated by this, we analyse the complementarity between future direct searches and neutrinoless double beta decay to probe the nature of HNLs, i.e., whether they are Majorana or quasi-Dirac states, and CP-violating phases in the sterile neutrino sector. Following an analytic discussion of the complementarity, we implement a generic fixed target experiment modelling DUNE. We perform a statistical study in how a combined search for HNLs in direct searches and neutrinoless double beta decay, using DUNE and LEGEND-1000 as representative examples, can probe the nature of sterile neutrinos.
| Type: | Article |
|---|---|
| Title: | Probing the nature of Heavy Neutral Leptons in direct searches and neutrinoless double beta decay |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.nuclphysb.2024.116785 |
| Publisher version: | https://doi.org/10.1016/j.nuclphysb.2024.116785 |
| Language: | English |
| Additional information: | © 2024 The Author(s). Published by Elsevier B.V. Funded by SCOAP³ under a Creative Commons license (http://creativecommons.org/licenses/by/4.0/) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10216909 |
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