Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders

2018/12/14 by Juan Carlos Helo, Haolin Li, Hao-Lin Li +6 · 3 citations
Physics and Astronomy · #Collider #Dark Matter and Cosmic Phenomena #Dirac (video compression format) #Large Hadron Collider #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Sterile neutrino #Yukawa potential #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevd.99.055042

published as Phys. Rev. D 99, 055042 (2019) · 28 pages, 10 figures, references added

arxiv created 2018/12/14 · openalex publication_date 2019/03/27 · arxiv updated 2019/04/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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 nonminimal LRSM scenario.

Citations

• TeV-scale seesaw with non-negligible left-right neutrino mixings
• Combined Measurement of the Higgs Boson Mass in pp Collisions at √(s)=7 and 8 TeV with the ATLAS and CMS Experiments
• Distinguishing the Littlest Higgs model with T-parity from supersymmetry at the LHC using trileptons
• Neutrino masses in SU(2) ⊗ U(1) theories
• Lepton number as the fourth "color"
• FeynRules 2.0 — A complete toolbox for tree-level phenomenology
• Review of Particle Physics
• Large mixing of light and heavy neutrinos in seesaw models and the LHC
• Majorana Higgses at colliders

Cited by

• GUT Physics in the Era of the LHC
• Dirac neutrinos in an SU(2) left-right symmetric model
• Heavy neutrino mixing prospects at hadron colliders: a machine learning study