{"paper":{"title":"Search for a light CP-odd Higgs boson in the radiative decays of J/psi","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"et al., The BESIII Collaboration: M. Ablikim","submitted_at":"2015-10-06T16:07:28Z","abstract_excerpt":"We search for a light Higgs boson $A^0$ in the fully reconstructed decay chain of $J/\\psi \\rightarrow \\gamma A^0$, $A^0 \\rightarrow \\mu^+\\mu^-$ using $(225.0\\pm2.8)\\times10^6$ $J/\\psi$ events collected by the BESIII experiment. The $A^0$ is a hypothetical CP-odd light Higgs boson predicted by many extensions of the Standard Model including two spin-0 doublets plus an extra singlet. We find no evidence for $A^0$ production and set $90\\%$ confidence-level upper limits on the product branching fraction $\\mathcal{B}(J/\\psi \\rightarrow \\gamma A^0) \\times \\mathcal{B}(A^0 \\rightarrow \\mu^+\\mu^-)$ in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.01641","kind":"arxiv","version":4},"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"}