PT Journal
AU Alcaide, J
   Banerjee, S
   Chala, M
   Titov, A
TI Probes of the Standard Model effective field theory extended with a right-handed neutrino
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2019
BP 031
EP 18pp
VL 08
IS 8
DI 10.1007/JHEP08(2019)031
LA English
DE Beyond Standard Model; Effective Field Theories; Neutrino Physics
AB 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-lived.
ER