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arxiv: 2203.16785 · v3 · pith:BTYJVIO4new · submitted 2022-03-31 · ⚛️ nucl-ex

Exclusive π⁻ Electroproduction off the Neutron in Deuterium in the Resonance Region

Y. Tian , R. W. Gothe , V. I. Mokeev , G. Hollis , M. J. Amaryan , W. R. Armstrong , H. Atac , H. Avakian
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L. Barion M. Battaglieri I. Bedlinskiy B. Benkel F. Benmokhtar A. Bianconi L. Biondo A. Biselli F. Boss\`u S. Boiarinov M. Bond\`i K. T. Brinkmann W. J. Briscoe S. Bueltmann D. Bulumulla V. D. Burkert R. Capobianco D. S. Carman J. C. Carvajal A. Celentano V. Chesnokov T. Chetry G. Ciullo G. Clash P. L. Cole M. Contalbrigo G. Costantini A. D'Angelo N. Dashyan R. De Vita M. Defurne A. Deur S. Diehl C. Djalali R. Dupre H. Egiyan A. El Alaoui L. El Fassi L. Elouadrhiri P. Eugenio S. Fegan A. Filippi G. Gavalian G. P. Gilfoyle F. X. Girod A. A. Golubenko G. Gosta K. Griffioen M. Guidal H. Hakobyan M. Hattawy T. B. Hayward A. Hobart M. Holtrop Y. Ilieva D. G. Ireland E. L. Isupov D. Jenkins H. S. Jo K. Joo S. Joosten D. Keller A. Khanal M. Khandaker A. Kim W. Kim F. J. Klein A. Kripko V. Kubarovsky V. Lagerquist L. Lanza M. Leali P. Lenisa K. Livingston I. .J .D. MacGregor D. Marchand L. Marsicano V. Mascagna B. McKinnon S. Migliorati T. Mineeva M. Mirazita C. Munoz Camacho P. Nadel-Turonski P. Naidoo K. Neupane J. Newton S. Niccolai M. Nicol G. Niculescu M. Osipenko P. Pandey M. Paolone L. L. Pappalardo R. Paremuzyan K. Park E. Pasyuk S. J. Paul W. Phelps N. Pilleux D. Po\v{c}ani\'c O. Pogorelko J. Poudel J. W. Price Y. Prok T. Reed M. Ripani J. Ritman A. Rizzo G. Rosner F. Sabati\'e C. Salgado S. Schadmand A. Schmidt R. A. Schumacher E. V. Shirokov U. Shrestha P. Simmerling D. Sokhan N. Sparveris S. Stepanyan I. I. Strakovsky S. Strauch R. Tyson M. Ungaro L. Venturelli H. Voskanyan E. Voutier D. P. Watts K. Wei X. Wei M. H. Wood B. Yale N. Zachariou J. Zhang (The CLAS Collaboration)
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classification ⚛️ nucl-ex
keywords exclusiveresultsboundcrossdeuteriumextractedneutronsquasi-free
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New results for the exclusive and quasi-free cross sections off neutrons bound in deuterium ${\gamma}_vn(p) \rightarrow p{\pi}^{-} (p)$ are presented over a wide final state hadron angle range with a kinematic coverage of the invariant mass ($W$) up to 1.825 GeV and the virtual photon four-momentum transfer squared ($Q^{2}$) from 0.4 to 1.0 GeV$^2$. The exclusive structure functions were extracted and their Legendre moments were obtained. Final-state-interaction contributions have been kinematically separated from the extracted quasi-free cross sections off bound neutrons solely based on the analysis of the experimental data. These new results will serve as long-awaited input for phenomenological analyses to extract the $Q^{2}$ evolution of previously unavailable $n \to N^{*}$ electroexcitation amplitudes and to improve state-of-the-art models of neutrino scattering off nuclei by augmenting the already available results from free protons.

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