Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay
arxiv(2024)
摘要
An investigation of relatively light (GeV-scale), long-lived right-handed
neutrinos is performed within minimal left-right symmetric models using the
neutrino-extended Standard Model Effective Field Theory framework. Light
sterile neutrinos can be produced through rare decays of kaons, D-mesons, and
B-mesons at the Large Hadron Collider (LHC) and the Long-Baseline Neutrino
Facility (LBNF) of Fermilab. Their decays could result in displaced vertices,
which can be reconstructed. By performing Monte-Carlo simulations, we assess
the sensitivities of the future LHC far-detector experiments ANUBIS, CODEX-b,
FACET, FASER(2), MoEDAL-MAPP1(2), MATHUSLA, the recently approved beam-dump
experiment SHiP, and the upcoming neutrino experiment DUNE at the LBNF, to the
right-handed gauge-boson mass M_W_R as functions of neutrino masses. We
find that DUNE and SHiP could be sensitive to right-handed gauge-boson masses
up to ∼ 25 TeV. We compare this reach to indirect searches such as
neutrinoless double beta decay, finding that displaced-vertex searches are very
competitive.
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