Publication details for Mikael ChalaAlcaide, Julien , Banerjee, Shankha , Chala, Mikael & Titov, Arsenii (2019). Probes of the Standard Model effective field theory extended with a right-handed neutrino. Journal of High Energy Physics 2019(8): 31.
- Publication type: Journal Article
- ISSN/ISBN: 1029-8479
- DOI: 10.1007/JHEP08(2019)031
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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