Probing Neutrino Dirac Mass in Left-Right Symmetric Models at the LHC and Next Generation Colliders

Abstract

We assess the sensitivity of the LHC, its high energy upgrade, and a prospective 100 TeV hadronic collider to the Dirac Yukawa coupling of the heavy neutrinos in left-right symmetric models (LRSMs). We focus specifically on the trilepton final state in regions of parameter space yielding prompt decays of the right-handed gauge bosons ($W_R$) and neutrinos ($N_R$). In the minimal LRSM, the Dirac Yukawa couplings are completely fixed in terms of the mass matrices for the heavy and light neutrinos. In this case, the trilepton signal provides a direct probe of the Dirac mass term for a fixed $W_R$ and $N_R$ mass. We find that while it is possible to discover the $W_R$ at the LHC, probing the Dirac Yukawa couplings will require a 100 TeV $pp$ collider. We also show that the observation of the trilepton signal at the LHC would indicate the presence of a non-minimal LRSM scenario.

28 pages, 10 figures, references added

References in corpus (18)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• First Limits on Left-Right Symmetry Scale from LHC Data
• Left-Right Symmetry: from Majorana to Dirac
• Multilepton and Lepton Jet Probes of Sub-Weak-Scale Right-Handed Neutrinos
• Right Handed Quark Mixing in Left-Right Symmetric Theory
• Neutrino Jets from High-Mass $W_R$ Gauge Bosons in TeV-Scale Left-Right Symmetric Models
• Same Sign versus Opposite Sign Dileptons as a Probe of Low Scale Seesaw Mechanisms
• Strong P invariance, neutron EDM and minimal Left-Right parity at LHC
• Lepton Number Violation and W' Chiral Couplings at the LHC
• Quasi-Dirac neutrinos at the LHC
• A Compromise between Neutrino Masses and Collider Signatures in the Type-II Seesaw Model
• Lepton-Jets and Low-Mass Sterile Neutrinos at Hadron Colliders
• Inverse see-saw, leptogenesis, observable proton decay and ${\Delta }_{\mathrm{R}}^{\pm \pm }$ in SUSY SO(10) with heavy W_R
• Distinguishing the Littlest Higgs model with T-parity from supersymmetry at the LHC using trileptons
• GeV Seesaw, Accidentally Small Neutrino Masses, and Higgs Decays to Neutrinos

Cited by in corpus (1)

• GUT Physics in the era of the LHC