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Dark neutrinos and a three-portal connection to the standard model

Ballett, Peter; Hostert, Matheus; Pascoli, Silvia

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Authors

Peter Ballett

Matheus Hostert



Abstract

We introduce a dark neutrino sector which respects a hidden Uð1Þ0 gauge symmetry, subsequently broken by the vacuum expectation value of a dark scalar. The model is a self-consistent realization of an extended hidden sector that communicates with the standard model only via the three renormalizable portals, namely, neutrino, vector and scalar mixing. The interplay between portal couplings leads to several novel signatures in heavy neutrino, dark photon, and dark scalar searches, typically characterized by multileptons plus missing energy and displaced vertices. A striking signature arises in kaon factories such as NA62, where Kþ → lþ α νlþ β l− β decays could reveal a heavy neutrino and a light dark photon resonance above backgrounds. Given the open parameter space, we also comment on recent ideas to explain outstanding experimental anomalies, and how they would fit into our proposed model. A minimal extension of the model, possibly motivated by anomaly cancellation, can accommodate a dark matter candidate strongly connected to the neutrino sector.

Citation

Ballett, P., Hostert, M., & Pascoli, S. (2020). Dark neutrinos and a three-portal connection to the standard model. Physical Review D, 101(11), Article 115025. https://doi.org/10.1103/physrevd.101.115025

Journal Article Type Article
Acceptance Date Jun 2, 2020
Online Publication Date Jun 19, 2020
Publication Date 2020-06
Deposit Date Jul 8, 2020
Publicly Available Date Jul 8, 2020
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 101
Issue 11
Article Number 115025
DOI https://doi.org/10.1103/physrevd.101.115025

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.





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