{"paper":{"title":"Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Camsonne, A.J.R. Puckett, A.J. Sarty, A. Saha, B. Briscoe, B. Craver, B.L. Berman, B. Lee, B. Wojteskhowski, C.E. Hyde-Wright, C.E. Keppel, C.F. Perdrisat, C.W. de Jager, D.J. Margaziotis, D. Meekins, D. Tedeschi, D.W. Higinbotham, E. Chudakov, E. Cisbani, E.J. Brash, E. Khrosinkova, E. Kuchina, E. Piasetzky, E. Schulte, F. Cusanno, F. Garibaldi, F.R. Wesselmann, G. Kumbartzki, I. Albayrak, J. Arrington, J. Glister, J.M. Udias, J.-P. Chen, J.R. Vignote, K. Park, L. Pentchev, L. Tang, M.E. Christy, M.K. Jones, M. Paolone, O. Glamazdin, P.E. Ulmer, P. Solvignon, R.D. Ransome, R. Ent, R. Gilman, R. Lindgren, R. Michaels, R.R. Subudi, S.P. Malace, S. Strauch, V.A. Punjabi, V. Tvaskis, X. Jiang, X. Qian, X. Zhan, Y. Ilieva, Y. Qiang","submitted_at":"2010-02-10T20:45:26Z","abstract_excerpt":"Proton recoil polarization was measured in the quasielastic 4He(e,e'p)3H reaction at Q^2 = 0.8 (GeV/c)^2 and 1.3 (GeV/c)^2 with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the 1H(e,e' p) reaction, contradicting a relativistic distorted-wave approximation, and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2188","kind":"arxiv","version":8},"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"}