{"paper":{"title":"Measurement of Inverse Pion Photoproduction at Energies Spanning the N(1440) Resonance","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A.F. Ramirez, A. Kulbardis, A. Marusic, A. Shafi, A. Starostin, B.M.K. Nefkens, C. Bennhold, C.E. Allgower, D.D. Koetke, D. Grosnick, D. Isenhower, D.M. Manley, D. Peaslee, G. Lolos, H.M. Staudenmaier, H. Spinka, I.I. Strakovsky, I. Lopatin, I. Supek, J. Olmsted, J.R. Comfort, J.W. Price, K. Craig, M. Clajus, M. Sadler, N. Knecht, N. Kozlenko, N. Phaisangittisaku, R.A. Arndt, R.L. Workman, R. Manweiler, S. Kruglov, S. McDonald, S. Prakhov, T.D.S. Stanislaus, V. Bekrenev, W.B. Tippens, W.J. Briscoe, Z. Papandreou","submitted_at":"2004-05-25T18:53:16Z","abstract_excerpt":"Differential cross sections for the process pi^- p -> gamma n have been measured at Brookhaven National Laboratory's Alternating Gradient Synchrotron with the Crystal Ball multiphoton spectrometer. Measurements were made at 18 pion momenta from 238 to 748 MeV/c, corresponding to E_gamma for the inverse reaction from 285 to 769 MeV. The data have been used to evaluate the gamma n multipoles in the vicinity of the N(1440) resonance. We compare our data and multipoles to previous determinations. A new three-parameter SAID fit yields 36 +/- 7 (GeV)^-1/2 X 10^-3 for the A^n_1/2 amplitude of the P_1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0405026","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/nucl-ex/0405026/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"}