{"paper":{"title":"Evidence for the production of thermal muon pairs with masses above 1 GeV/c^2 in 158A GeV Indium-Indium Collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"A. Colla, A. David, A. de Falco, A. Devaux, A. Ferretti, A. Forster, A. Guichard, A. Masoni, A. Neves, B. Chaurand, C. Cicalo, C. Lourenco, C. Oppedisano, E. Radermacher, E. Scomparin, F. Manso, G. Puddu, G. Usai, H. Enyo, H. Gulkanian, H. J. Specht, H. K. Wohri, H. Ohnishi, J. Castor, J. Fargeix, J. Lozano, J. M. Heuser, J. Seixas, K. Banicz, K. Borer, L. Ducroux, L. Kluberg, M. Floris, M. Keil, NA60 Collaboration: R. Arnaldi, N. Guettet, P. Cortese, P. Force, P. Martins, P. Parracho, P. Pillot, P. Ramalhete, P. Rosinsky, P. Sonderegger, R. Shahoyan, R. Tieulent, R. Veenhof, S. Damjanovic, S. Serci, T. Poghosyan, W. Chen, Z. Li","submitted_at":"2008-10-17T17:36:41Z","abstract_excerpt":"The yield of muon pairs in the invariant mass region 1<M<2.5 GeV/c^2 produced in heavy-ion collisions significantly exceeds the sum of the two expected contributions, Drell-Yan dimuons and muon pairs from the decays of D meson pairs. These sources properly account for the dimuons produced in proton-nucleus collisions. In this paper, we show that dimuons are also produced in excess in 158 A GeV In-In collisions. We furthermore observe, by tagging the dimuon vertices, that this excess is not due to enhanced D meson production, but made of prompt muon pairs, as expected from a source of thermal d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0810.3204","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/0810.3204/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"}