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Probes of the Standard Model effective field theory extended with a right-handed neutrino

Alcaide, Julien; Banerjee, Shankha; Chala, Mikael; Titov, Arsenii

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Authors

Julien Alcaide

Shankha Banerjee

Mikael Chala

Arsenii Titov



Abstract

If neutrinos are Dirac particles and, as suggested by the so far null LHC results, any new physics lies at energies well above the electroweak scale, the Standard Model effective field theory has to be extended with operators involving the right-handed neutrinos. In this paper, we study this effective field theory and set constraints on the different dimension-six interactions. To that aim, we use LHC searches for associated production of light (and tau) leptons with missing energy, monojet searches, as well as pion and tau decays. Our bounds are generally above the TeV for order one couplings. One particular exception is given by operators involving top quarks. These provide new signals in top decays not yet studied at colliders. Thus, we also design an LHC analysis to explore these signatures in the tt¯ production. Our results are also valid if the right-handed neutrinos are Majorana and long

Citation

Alcaide, J., Banerjee, S., Chala, M., & Titov, A. (2019). Probes of the Standard Model effective field theory extended with a right-handed neutrino. Journal of High Energy Physics, 2019(8), Article 31. https://doi.org/10.1007/jhep08%282019%29031

Journal Article Type Article
Acceptance Date Jul 14, 2019
Online Publication Date Aug 6, 2019
Publication Date Aug 31, 2019
Deposit Date Aug 8, 2019
Publicly Available Date Mar 29, 2024
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2019
Issue 8
Article Number 31
DOI https://doi.org/10.1007/jhep08%282019%29031

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

Copyright Statement
This article is distributed under the terms of the Creative Commons
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in
any medium, provided the original author(s) and source are credited.





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