2018/01/31 by Giovanna Cottin, Juan Carlos Helo, Martin Hirsch · 1 citation
Physics and Astronomy · #hep-ph #hep-ex
paper · pdf · doi:10.1103/physrevd.97.055025
published as Phys. Rev. D 97, 055025 (2018) · 6 pages, 4 figures. v2: added references, corrected typos, clarification on WR production in the abstract, extended arguments in the introduction, section 2 and section 3. Results unchanged. Version accepted for publication in PRD. v3 : New Figure 4, matches corrected version in PRD
arxiv created 2019/03/22 · arxiv updated 2019/03/25
We study discovery prospects for long-lived sterile neutrinos at the LHC with multitrack displaced vertices, with masses below the electroweak scale. We reinterpret current displaced vertex searches making use of publicly available, parametrized selection efficiencies for modeling the detector response to displaced vertices. We focus on production of right-handed WR bosons and neutrinos N in a left-right symmetric model, and find poor sensitivity. After proposing a different trigger strategy (considering the prompt lepton accompanying the neutrino displaced vertex) and optimized cuts in the invariant mass and track multiplicity of the vertex, we find that the LHC with √(s)=13 TeV and 300 fb-1 is able to probe sterile neutrino masses between 10\hspace0.1cmGeV<mN<20 GeV (for a right-handed gauge boson mass of 2\hspace0.1cmTeV<m_WR<3.5 TeV). To probe higher masses up to mN∼ 30 GeV and m_WR<5 TeV, 3000 fb-1 will be needed. This work joins other efforts in motivating dedicated experimental searches to target this low sterile neutrino mass region.