Left-Right Symmetric Models at the High-Intensity Frontier

Abstract

We study constraints on Left-Right Symmetric models from searches of semileptonic decays of $D$, $D_s$, $B$ mesons, mediated by heavy neutrinos $N$ with masses $m_N\sim$ GeV that go on their mass shell leading to a resonant enhancement of the rates. Using these processes we examine, as a function of $m_N$ and $M_{W_R}$, the physics reach of the recently proposed high-intensity beam dump experiment SHiP, which is expected to produce a large sample of $D_s$ mesons. We compare these results with the corresponding reach of neutrinoless double beta decay experiments, as well as like-sign dilepton searches with displaced vertices at the LHC. We conclude that the SHiP experiment has clear advantages in probing the Left-Right Symmetric models for heavy neutrinos in the GeV mass range.

5 pages, 5 figures. RevTeX format. V2: Some figures and explanations improved, references added. Conclusions unchanged. V3: Minor grammatical improvements, version accepted for publication in PRD

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• Heavy Neutral Leptons at FASER
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• Searches for light sterile neutrinos with multitrack displaced vertices
• Doubly-Charged Scalars in the Type-II Seesaw Mechanism: Fundamental Symmetry Tests and High-Energy Searches
• Distinguishing Dirac/Majorana Sterile Neutrinos at the LHC
• Dilepton bounds on left-right symmetry at the LHC run II and neutrinoless double beta decay
• Sensitivity to Majorana neutrinos in $\Delta L=2$ decays of $B_c$ meson at LHCb
• Implications of the Diboson Excess for Neutrinoless Double Beta Decay and Lepton Flavor Violation in TeV Scale Left Right Symmetric Model
• Constraining Right Handed Gauge Boson Mass from Lepton Number Violating Meson Decays in a Low Scale Left Right Model
• Revisiting the LHC reach in the displaced region of the minimal left-right symmetric model
• Ameliorating Higgs Induced Flavor Constraints on TeV Scale $W_R$
• LHC dijet constraints on double beta decay
• Probing Left-Right Seesaw using Beam Polarization at an $e^{+}{e}^{-}$ Collider
• Long-lived heavy neutral leptons at lepton colliders as a probe of left-right symmetric models