Re-examining $N_R$-EFT Upto Dimension Six

Abstract

The gauge singlet right-handed neutrinos (RHNs) are essential fields in several neutrino mass models that explain the observed eV scale neutrino mass. We assume RHN field to be present in the vicinity of the electroweak scale and all the other possible beyond the standard model (BSM) fields arise at high energy scale $\ge \Lambda$. In this scenario, the BSM physics can be described using effective field theory (EFT) where the set of canonical degrees of freedoms consists of both RHN and SM fields. EFT of this kind is usually dubbed as $N_R$-EFT. We systematically construct relevant operators that can arise at dimension five and six while respecting underlying symmetry. To quantify the phenomenological implication of these EFT operators we calculate different couplings that involve RHN fields. We discuss the constraints on these EFT operators coming from different energy and precision frontier experiments. For $pp$, $e^{-}p$ and $e^{+}{e}^{-}$ colliders, we identify various channels which crucially depends on these operators. We analytically evaluate the decay widths of RHN considering all relevant operators and highlight the differences that arise because of the EFT framework. Based upon the signal cross-section we propose different multi-lepton channels to search for the RHN at 14 TeV LHC as well as \emph{future} particle colliders.

References in corpus (12)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Effects of new leptons in Electroweak Precision Data
• Heavy Majorana Neutrinos in the Effective Lagrangian Description: Application to Hadron Colliders
• Right-handed neutrino magnetic moments
• Neutrino Mass and Baryon Asymmetry from Dirac Seesaw
• XENON1T signal from transition neutrino magnetic moments
• The see-saw portal at future Higgs Factories
• Search for supersymmetry in final states with photons and missing transverse momentum in proton-proton collisions at 13 TeV
• Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Cited by in corpus (7)

• Effective portals to heavy neutral leptons
• Sensitivity prospects for lepton-trijet signals in the $\nu$SMEFT at the LHeC
• Constraining the SMEFT Extended with Sterile Neutrinos at FCC-ee
• Pinning down the leptophobic $Z^{\prime }$ in leptonic final states with Deep Learning
• Future collider sensitivities to $\nu$SMEFT interactions
• Phenomenology of Dirac neutrino EFTs up to dimension six
• Sensitivity of $W$-boson measurements to low-mass right-handed neutrinos