{"paper":{"title":"Search for new light vector boson using $J/\\Psi$ at BESIII and Belle II","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Kayoung Ban, Po-Yan Tseng, Seokhee Park, Seong Chan Park, Yongsoo Jho, Youngjoon Kwon","submitted_at":"2020-12-08T03:18:28Z","abstract_excerpt":"We investigate various search strategies for light vector boson $X$ in $\\mathcal{O}(10)~{\\rm MeV}$ mass range using $J/\\Psi$ associated channels at BESIII and Belle II: (i) $J/\\Psi \\to \\eta_c X$ with $10^{10} J/\\Psi$s at BESIII, (ii) $J/\\Psi (\\eta_c +X) +\\ell \\bar{\\ell}$ production at Belle~II, and (iii) $J/\\Psi +X$ with the displaced vertex in $X\\to e^+e^-$ decay are analyzed and the future sensitivities at Belle II with 50 ${\\rm ab}^{-1}$ luminosity are comprehensively studied. By requiring the displaced vertex to be within the beam pipe, the third method results in nearly background-free an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.04190","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2012.04190/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}