Experimental Constraints on Higgs Boson Decays to TeV-scale Right-Handed Neutrinos

Abstract

The existence of neutrino masses strongly suggests that right-handed neutrinos exist, but the data do not favor any particular scale for the Majorana mass parameters. Here I explore the possibility that these particles exist at the electroweak scale along with additional new physics at the TeV scale . Higher dimension operators involving right-handed neutrinos and the Higgs boson can introduce new decay modes of the Higgs boson, significantly modifying its phenomenology if it is light. With minimal flavor violation the Higgs boson cascade decays to 6 particles containing two highly displaced vertices. Each displaced vertex produces an odd number of leptons, leading to a dramatic signature of overall lepton violation at each vertex. I discuss the limits from the Tevatron, and find that they are close to exploring interesting regions of parameters, while limiting others. Moving beyond minimal flavor violation, cascade decays of the Higgs boson into as many as 14 particles can occur.

arXiv comment38 pages, 5 figures

References in corpus (23)

• Echoes of a Hidden Valley at Hadron Colliders
• Radiatively Induced Neutrino Masses and Large Higgs-Neutrino Couplings in the Standard Model with Majorana Fields
• Escaping the Large Fine Tuning and Little Hierarchy Problems in the Next to Minimal Supersymmetric Model and h-> aa Decays
• Experimental Signatures of Low Energy Gauge Mediated Supersymmetry Breaking
• Minimal Flavor Violation in the Lepton Sector
• Discovering the Higgs Through Highly-Displaced Vertices
• Signatures for Majorana neutrinos at hadron colliders
• Sparticle Spectroscopy and Electroweak Symmetry Breaking with Gauge-Mediated Supersymmetry Breaking
• A Higgs-Higgs bound state due to New Physics at a TeV
• Consistency of LEP $Z+b$-jets excess with an {\boldmath $h\to aa$} Decay Scenario and Low-Fine-Tuning NMSSM Models
• Modifications to the Properties of the Higgs Boson
• Invisible Higgs Boson Decay into Massive Neutrinos of 4th Generation
• Possible Effects of a Hidden Valley on Supersymmetric Phenomenology
• A model of electroweak-scale right-handed neutrino mass
• Visible Cascade Higgs Decays to Four Photons at Hadron Colliders
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• Reduced Fine-Tuning in Supersymmetry with R-parity violation
• Phenomenology of Minimal Lepton Flavor Violation
• Search for Heavy, Long-Lived Particles that Decay to Photons at CDF II
• Phenomenological Implications of Low Energy Supersymmetry Breaking
• Search for R-parity violating supersymmetry via the LLE couplings lambda_{121}, lambda_{122} or lambda_{133} in ppbar collisions at sqrt(s)=1.96 TeV
• Search for Long-Lived Parents of Z Bosons in pbar-p Collisions at sqrt{s}=1.8 TeV
• Search for New Physics in Lepton + Photon + X Events with 929 pb-1 of ppbar Collisions at roots = 1.96 TeV

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