{"paper":{"title":"Separated Response Function Ratios in Exclusive, Forward pi^{+/-} Electroproduction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Klein, A. Lung, A. Matsumura, A. Sarty, B. Barrett, B. Mueller, B. Zihlmann (The Jefferson Lab Fpi Collaboration), C. Armstrong, C. Bochna, C. Butuceanu, C.C. Chang, C.E. Keppel, C. Perdrisat, C. Xu, C. Yan, D. Abbott, D. Gaskell, D.J. Mack, D.J. Margaziotis, D. Koltenuk, D. McKee, D. Meekins, D. Pitz, D. Potterveld, D. van Westrum, E.F. Gibson, E.J. Beise, E.J. Brash, G.J. Lolos, G.M. Huber, G. Niculescu, G.R. Smith, G. Warren, H. Anklin, H. Breuer, H. Fenker, H. Jackson, H. Mkrtchyan, H.P. Blok, I.K. Shin, I. Niculescu, J. Arrington, J. Dunne, J. Liu, J. Mitchell, J. Reinhold, J. Roche, J. Volmer, K. Aniol, K. Assamagan, K. Gustafsson, K. Vansyoc, L.G. Tang, L.M. Qin, L. Pentchev, M.E. Christy, M.K. Jones, M. Liang, N. Chant, O.K. Baker, P.E. Reimer, P.G. Roos, P.H. Kim, P. Markowitz, P.M. King, R. Ent, R. Gilman, R.J. Holt, R.L.J. van der Meer, S. Avery, S.A. Wood, S. Jin, S. Stepanyan, S. Vidakovic, T. Eden, T. Horn, T. Miyoshi, V. Kovaltchouk, V. Punjabi, V. Tadevosyan, V. Tvaskis, W. Boeglin, W. Hinton, W. Kim, W. Vulcan, W.-X. Zhao, X. Zheng, Y. Okayasu","submitted_at":"2014-04-15T16:55:42Z","abstract_excerpt":"The study of exclusive $\\pi^{\\pm}$ electroproduction on the nucleon, including separation of the various structure functions, is of interest for a number of reasons. The ratio $R_L=\\sigma_L^{\\pi^-}/\\sigma_L^{\\pi^+}$ is sensitive to isoscalar contamination to the dominant isovector pion exchange amplitude, which is the basis for the determination of the charged pion form factor from electroproduction data. A change in the value of $R_T=\\sigma_T^{\\pi^-}/\\sigma_T^{\\pi^+}$ from unity at small $-t$, to 1/4 at large $-t$, would suggest a transition from coupling to a (virtual) pion to coupling to in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.3985","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"}