{"paper":{"title":"Measurement of the recoil polarization in the p (\\vec e, e' \\vec p) pi^0 reaction at the \\Delta(1232) resonance","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Liesenfeld, A. Suele, A. Wagner, D. Baumann, D. Drechsel, D. Elsner, D. Rohe, F. Klein, G.A. Warren, G. Rosner, H. Merkel, H. Schmieden, I. Ewald, I. Sick, J. Bermuth, J. Friedrich, J. Lac, J. McIntyre, J.M. Friedrich, K. Bohinc, K.W. Krygier, L. Tiator, M. Ding, M. Distler, M. Kahrau, M. Potokar, M. Seimetz, M. Weis, P. Bartsch, P. Jennewein, P. Merle, R. Boehm, R.D. Ransome, R. Geiges, R. Neuhausen, S. Derber, S. Hedicke, S. Sirca, S.S. Kamalov, Th. Pospischil, Th Walcher, U. Mueller","submitted_at":"2000-10-31T13:33:17Z","abstract_excerpt":"The recoil proton polarization has been measured in the p (\\vec e,e'\\vec p) pi^0 reaction in parallel kinematics around W = 1232 MeV, Q^2 = 0.121 (GeV/c)^2 and epsilon = 0.718 using the polarized c.w. electron beam of the Mainz Microtron. Due to the spin precession in a magnetic spectrometer, all three proton polarization components P_x/P_e = (-11.4 \\pm 1.3 \\pm 1.4) %, P_y = (-43.1 \\pm 1.3 \\pm 2.2) %, and P_z/P_e = (56.2 \\pm 1.5 \\pm 2.6) % could be measured simultaneously. The Coulomb quadrupole to magnetic dipole ratio CMR = (-6.4\\pm 0.7_{stat}\\pm 0.8_{syst}) % was determined from P_x in the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0010020","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/0010020/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"}