{"paper":{"title":"Analysis of $J/\\psi(\\eta_c)\\to \\gamma ~+$ invisible decays in the standard model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Dao-Neng Gao","submitted_at":"2014-08-20T07:33:59Z","abstract_excerpt":"Motivated by the experimental study of $J/\\psi\\to\\gamma ~+$ invisible decay by the CLEO Collaboration, we analyze the process $J/\\psi\\to \\gamma \\nu\\bar{\\nu}$, as the standard model background for this invisible decay, at the lowest order. Our investigation shows that Br($J/\\psi\\to \\gamma \\nu\\bar{\\nu}$) is far below the present experimental upper limit on the branching ratio of $J/\\psi\\to\\gamma ~+$ invisible, which indicates that some interesting room for new physics in this channel might be expected. We also present a similar analysis of the $\\eta_c\\to \\gamma \\nu\\bar{\\nu}$ decay."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.4552","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"}