Target and beam-target spin asymmetries in exclusive π + and π − electroproduction with 1.6- to 5.7-GeV electrons

E. Bosted S. Biselli S. Careccia G. Dodge R. Fersch N. Guler E. Kuhn J. Pierce Y. Prok X. Zheng P. Adhikari D. Adikaram Z. Akbar J. Amaryan S. Anefalos Pereira G. Asryan H. Avakian A. Badui J. Ball 1 N. Baltzell M. Battaglieri V. Batourine I. Bedlinskiy S. Boiarinov J. Briscoe S. Bültmann V. Burkert T. Cao S. Carman A. Celentano S. Chandavar G. Charles 2 T. Chetry G. Ciullo L. Clark L. Colaneri L. Cole M. Contalbrigo O. Cortes V. Crede A. D'Angelo N. Dashyan R. De Vita A. Deur C. Djalali R. Dupre 2 H. Egiyan A. El Alaoui L. El Fassi P. Eugenio E. Fanchini G. Fedotov A. Filippi J. Fleming A. Forest A. Fradi 2 M. Garçon 1 N. Gevorgyan Y. Ghandilyan P. Gilfoyle L. Giovanetti X. Girod 1 C. Gleason W. Gohn E. Golovatch W. Gothe A. Griffioen L. Guo K. Hafidi C. Hanretty N. Harrison M. Hattawy D. Heddle K. Hicks M. Holtrop M. Hughes Y. Ilieva G. Ireland B. Ishkhanov L. Isupov D. Jenkins H. Jiang H. Jo 2 K. Joo S. Joosten D. Keller M. Khandaker W. Kim A. Klein J. Klein V. Kubarovsky V. Kuleshov L. Lanza P. Lenisa K. Livingston H. Lu I. Macgregor N. Markov E. Mccracken B. Mckinnon A. Meyer R. Minehart M. Mirazita V. Mokeev A. Movsisyan E. Munevar C. Munoz Camacho 2 P. Nadel-Turonski L. Net A. Ni S. Niccolai 2 G. Niculescu I. Niculescu M. Osipenko I. Ostrovidov R. Paremuzyan K. Park E. Pasyuk P. Peng W. Phelps S. Pisano O. Pogorelko J. Price S. Procureur 1 D. Protopopescu J. Puckett B. Raue M. Ripani A. Rizzo G. Rosner P. Rossi P. Roy F. Sabatié 1 C. Salgado A. Schumacher E. Seder Y. G. Sharabian A. Simonyan Iu. Skorodumina G. D. Smith N. Sparveris Ivana Stankovic S. Stepanyan I. Strakovsky S. Strauch V. Sytnik M. Taiuti Ye Tian B. Torayev M. Ungaro H. Voskanyan E. Voutier 2 N. Walford D. P. Watts X. Wei L. Weinstein M. H. Wood N. Zachariou L. Zana J. Zhang Z. W. Zhao I. Zonta
Abstract : Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $\pi^+$ and $\pi^-$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinally polarized electrons from longitudinally polarized protons (for $\pi^+$) and deuterons (for $\pi^-$) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is $1.11.5$ GeV. Very large target-spin asymmetries are observed for $W>1.6$ GeV. When combined with cross section measurements, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances with masses as high as 2.3 GeV.
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Physical Review C, American Physical Society, 2016, 94 (5), pp.055201. 〈10.1103/PhysRevC.94.055201〉
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Soumis le : jeudi 16 juin 2016 - 11:03:58
Dernière modification le : mercredi 31 janvier 2018 - 12:12:37

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E. Bosted, S. Biselli, S. Careccia, G. Dodge, R. Fersch, et al.. Target and beam-target spin asymmetries in exclusive π + and π − electroproduction with 1.6- to 5.7-GeV electrons. Physical Review C, American Physical Society, 2016, 94 (5), pp.055201. 〈10.1103/PhysRevC.94.055201〉. 〈in2p3-01332574〉

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