{"paper":{"title":"Light sterile neutrinos, dark matter, and new resonances in a $U(1)$ extension of the MSSM","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-ph","authors_text":"A. Hebbar, G. Lazarides, Q.Shafi","submitted_at":"2017-06-29T09:04:39Z","abstract_excerpt":"We present $\\psi'$MSSM, a model based on a $U(1)_{\\psi'}$ extension of the minimal supersymmetric standard model. The gauge symmetry $U(1)_{\\psi'}$, also known as $U(1)_N$, is a linear combination of the $U(1)_\\chi$ and $U(1)_\\psi$ subgroups of $E_6$. The model predicts the existence of three sterile neutrinos with masses $\\lesssim 0.1~{\\rm eV}$, if the $U(1)_{\\psi'}$ breaking scale is of order 10 TeV. Their contribution to the effective number of neutrinos at nucleosynthesis is $\\Delta N_{\\nu}\\simeq 0.29$. The model can provide a variety of possible cold dark matter candidates including the l"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.09630","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}