{"paper":{"title":"First Measurement of Near- and Sub-Threshold $J/\\psi$ Photoproduction off Nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Asaturyan, A. Austregesilo, A. Deur, A. Gasparian, A.I. Ostrovidov, A. Karki, A. Schick, A. Schmidt, A. Smith, A. Somov, B. Devkota, B. Yu, C. Ayerbe Gayoso, C. Fanelli, C. Paudel, D. Dutta, Deepak Bhetuwal, D. Nguyen, D.W. Higinbotham, E. Piasetzky, G. Chung, G.R. Linera, H.D. Bhatt, H. Egiyan, H. Gao, H. Li, H. Marukyan, H. Szumila-Vance, I. Jaegle, I. Strakovsky, J. Barlow, J. Guo, J. Ritman, J.R. Pybus, J. Schwiening, K. Hernandez, K. Mizutani, K. Peters, K. Suresh, L. Ehinger, L. Gan, M.D. McCaughan, M. McCracken, M.M. Dalton, O. Hen, P. Eugenio, P. Hurck, P.L. Cole, P. Sharp, R. Dotel, R.T. Jones, S. Adhikari, S.N. Santiesteban, S. Oresic, S. Somov, S. Taylor, T. Black, T. Kolar, T. Xiao, V. Kakoyan, V. Lyubovitskij, V.V. Berdnikov, V.V. Tarasov, W.B. Li, W.J. Briscoe, X. Zhou, Z. Papandreou, Z. Zhang","submitted_at":"2024-09-27T05:50:31Z","abstract_excerpt":"We report on the first measurement of $J/\\psi$ photoproduction from nuclei in the photon energy range of $7$ to $10.8$ GeV, extending above and below the photoproduction threshold in the free proton of $\\sim8.2$ GeV. The experiment used a tagged photon beam incident on deuterium, helium, and carbon, and the GlueX detector at Jefferson Lab to measure the semi-inclusive $A(\\gamma,e^+e^-p)$ reaction with a dilepton invariant mass $M(e^+e^-)\\sim m_{J/\\psi}=3.1$ GeV. The incoherent $J/\\psi$ photoproduction cross sections in the measured nuclei are extracted as a function of the incident photon ener"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.18463","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/2409.18463/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"}