Type-III see-saw: Search for triplet fermions in final states with multiple leptons and fat-jets at 13 TeV LHC

Abstract

The type-III see-saw model holding out a riveting rationale for the minuscule neutrino masses caters for a well-to-do phenomenology at the Large Hadron Collider (LHC). Several searches targetting the triplet fermions have been performed at the LHC. Not only are the signals for the leptonic final states considered in these searches suppressed by the branching fractions of the Standard Model (SM) bosons, but they are also beset with considerably large SM backgrounds. Thus, these searches are deemed not to be sensitive enough in probing the triplet fermions much heavier than 1 TeV. To this end, we perform a search for the triplet fermions in final states with multiple leptons and fat-jets that are cleaner than the usual LHC searches and allow kinematic reconstruction of the triplets. After performing a systematic and comprehensive analysis with seven distinct final states, we project the required luminosities for both $3\sigma$ and $5\sigma$ discoveries of the triplet fermions as a function of their mass. The triplet fermions with mass as large as 1265 (1380) and 1480 (1600) GeV could be discovered with $5\sigma$ ($3\sigma$) significance at 500 and 3000 fb${}^{-1}$ luminosities, respectively.

9 pages, 5 figures

References in corpus (20)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• An NNLO subtraction formalism in hadron collisions and its application to Higgs boson production at the LHC
• Vector boson pair production at the LHC
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• Distinguishing seesaw models at LHC with multi-lepton signals
• How bright is the proton? A precise determination of the photon parton distribution function
• Techniques for improved heavy particle searches with jet substructure
• The RooFit toolkit for data modeling
• The Photon Content of the Proton
• NLO QCD corrections to pp -> t anti-t b anti-b + X at the LHC
• vh@nnlo - Higgs Strahlung at hadron colliders
• Type-III see-saw at LHC
• Soft gluon resummation for gluon-induced Higgs Strahlung
• Electroweak scale seesaw and heavy Dirac neutrino signals at LHC
• Renormalizable Adjoint SU(5)
• QCD corrections to charged triple vector boson production with leptonic decay
• Search for evidence of the type-III seesaw mechanism in multilepton final states in proton-proton collisions at sqrt(s) = 13 TeV
• Testing triplet fermions at the electron-positron and electron-proton colliders using fat jet signatures

Cited by in corpus (13)

• The Present and Future Status of Heavy Neutral Leptons
• Review of searches for vector-like quarks, vector-like leptons, and heavy neutral leptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the CMS experiment
• Inclusive nonresonant multilepton probes of new phenomena at $\sqrt{s}=$ 13 TeV
• Neutrino seesaw models at one-loop matching: Discrimination by effective operators
• Phenomenology of Scalar Leptoquarks at the LHC in Explaining the Radiative Neutrino Mass, Muon $g-2$ and Lepton Flavour Violating Observables
• Testing electroweak scale seesaw models at $e^{-}\gamma$ and $\gamma \gamma$ colliders
• Search for exotic leptons in final states with two or three leptons and fat-jets at 13 TeV LHC
• Testing tree level TeV scale seesaw scenarios in $\mu$TRISTAN
• The Two Scales of New Physics in Higgs Couplings
• Probing heavy triplet leptons of the type-III seesaw mechanism at future muon colliders
• Unveiling the Secrets of New Physics Through Top Quark Tagging
• Boosted displaced decay of right-handed neutrinos at CMS, ATLAS and MATHUSLA
• Indian Contributions to LHC Theory