{"paper":{"title":"Moments of angular distribution and beam asymmetries in $\\eta\\pi^0$ photoproduction at GlueX","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Pilloni, A. P. Szczepaniak (JPAC collaboration), A. W. Jackura, C. Fern\\'andez-Ram\\'irez, M. Albaladejo, M. Mikhasenko, V. Mathieu","submitted_at":"2019-06-11T22:11:15Z","abstract_excerpt":"In the search for exotic mesons, the GlueX collaboration will soon extract moments of the $\\eta\\pi^0$ angular distribution. In the perspective of these results, we generalize the formalism of moment extraction to the case in which the two mesons are produced with a linearly polarized beam, and build a model for the reaction $\\vec \\gamma p \\to \\eta \\pi^0 p$. The model includes resonant $S$-, $P$-, $D$-waves in $\\eta\\pi^0$, produced by natural exchanges. Moments of the $\\eta\\pi^0$ angular distribution are computed with and without the $P$-wave, to illustrate the sensitivity to exotic resonances."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04841","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/1906.04841/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"}