Looking for hints of a reconstructible seesaw model at the Large Hadron Collider

Abstract

We study the production of heavy neutrinos at the Large Hadron Collider (LHC) through the dominant s-channel production mode as well as the vector boson fusion (VBF) process. We consider the TeV scale minimal linear seesaw model containing two heavy singlets with opposite lepton number. This model is fully reconstructible from oscillation data apart from an overall normalization constant which can be constrained from meta-stability of the electroweak vacuum and bounds coming from lepton flavor violation (LFV) searches. Dirac nature of heavy neutrinos in this model implies suppression of the conventional same-sign-dilepton signal at the LHC. We analyze the collider signatures with tri-lepton final state and missing transverse energy as well as VBF type signals which are characterized by two additional forward tagged jets. Our investigation reveals that due to stringent constraints on light-heavy mixing coming from LFV and meta-stability bounds, the model can be explored only for light to moderate mass range of heavy neutrinos. We also note that in case of a positive signal, flavor counting of the final tri-lepton channel can give information about the mass hierarchy of the light neutrinos.

v2: Matches with published version. v1: 19 Pages, 5 figures. Comments are welcome

References in corpus (30)

• 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
• PYTHIA 6.4 Physics and Manual
• FeynRules - Feynman rules made easy
• A standard format for Les Houches Event Files
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Distinguishing seesaw models at LHC with multi-lepton signals
• Neutrino mass, Dark Matter and Baryon Asymmetry via TeV-Scale Physics without Fine-Tuning
• Minimal Flavour Seesaw Models
• Signatures for Majorana neutrinos at hadron colliders
• Heavy neutrino signals at large hadron colliders
• Direct Bounds on Electroweak Scale Pseudo-Dirac Neutrinos from $\sqrt{s}=8$ TeV LHC Data
• New Mechanism for Neutrino Mass Generation and Triply Charged Higgs Bosons at the LHC
• Electroweak scale seesaw and heavy Dirac neutrino signals at LHC
• Search for anomalous production of events with three or more leptons in pp collisions at sqrt(s) = 8 TeV
• Non-unitary neutrino mixing and CP violation in the minimal inverse seesaw model
• Next-to-leading order QCD corrections to W+Z and W-Z production via vector-boson fusion
• Lepton Flavour Violation and theta(13) in Minimal Resonant Leptogenesis
• Next-to-leading order QCD corrections to Z boson pair production via vector-boson fusion
• TeV-scale Seesaw with Quintuplet Fermions
• Resonant CP Violation due to Heavy Neutrinos at the LHC
• Search for heavy Majorana neutrinos in mu+mu+[mu-mu-]+jets and e+e+[e-e-]+jets events in pp collisions at sqrt(s) = 7 TeV
• NMSSM and Seesaw Physics at LHC
• Leptogenesis with Linear, Inverse or Double Seesaw
• Minimal Dynamical Inverse See Saw
• Neutrino Masses from Loop-induced $d\ge 7$ Operators
• Cascade Seesaw for Tiny Neutrino Mass
• Impact of LSP Character on Slepton Reach at the LHC
• Flavor Violating Transitions of Charged Leptons from a Seesaw Mechanism of Dimension Seven
• Search for a Standard Model Higgs Boson in CMS via Vector Boson Fusion in the H->WW->lνlνChannel

Cited by in corpus (4)

• Multilepton and Lepton Jet Probes of Sub-Weak-Scale Right-Handed Neutrinos
• Kadanoff-Baym Approach to Flavour Mixing and Oscillations in Resonant Leptogenesis
• Electroweak vacuum stability in presence of singlet scalar dark matter in TeV scale seesaw models
• Constraints on a seesaw model leading to quasidegenerate neutrinos and signatures at the LHC