{"paper":{"title":"A prototype large-angle photon veto detector for the P326 experiment at CERN","license":"","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"A. Antonelli, A. Romano, E. Capitolo, E. Leonardi, F. Ambrosino, G. Lamanna, G. Saracino, L. Iannotti, M. Moulson, M. Napolitano, M. Raggi, M. Serra, P.S. Cooper, P. Valente, R. Fantechi, S. Venditti, T. Spadaro, V. Palladino","submitted_at":"2007-11-21T15:37:17Z","abstract_excerpt":"The P326 experiment at the CERN SPS has been proposed with the purpose of measuring the branching ratio for the decay K^+ \\to \\pi^+ \\nu \\bar{\\nu} to within 10%. The photon veto system must provide a rejection factor of 10^8 for \\pi^0 decays. We have explored two designs for the large-angle veto detectors, one based on scintillating tiles and the other using scintillating fibers. We have constructed a prototype module based on the fiber solution and evaluated its performance using low-energy electron beams from the Frascati Beam-Test Facility. For comparison, we have also tested a tile prototyp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0711.3398","kind":"arxiv","version":1},"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"}