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Polarized structure function σLT′ from π0p electroproduction data in the resonance region at 0.4GeV2<Q2<1.0GeV2

E. L. Isupov36,7, V. D. Burkert39, A. A. Golubenko36, K. Joo7, N. S. Markov39,7, V. I. Mokeev39, L. C. Smith46, W. R. Armstrong1, H. Atac38 et al. (CLAS Collaboration)

H. Atac38, H. Avakian39, N. A. Baltzell39, L. Barion14, M. Battaglieri39,16, I. Bedlinskiy26, F. Benmokhtar8, A. Bianconi41,20, L. Biondo16,19,42, A. S. Biselli9,3, M. Bondi16, F. Bossù5, W. J. Briscoe13, W. K. Brooks40,39, D. Bulumulla31, R. A. Capobianco7, D. S. Carman39, J. C. Carvajal11, P. Chatagnon21, V. Chesnokov36, G. Ciullo14,10, P. L. Cole24,39, B. A. Clary51,7, M. Contalbrigo14, G. Costantini41,20, A. D'Angelo17,35, N. Dashyan48, R. De Vita16, M. Defurne5, A. Deur39, S. Diehl32,7, C. Djalali30,37, R. Dupre21, H. Egiyan39, A. El Alaoui40, L. El Fassi25, L. Elouadrhiri39, P. Eugenio12, S. Fegan44, A. Filippi18, G. Gavalian39,27, G. P. Gilfoyle34, D. I. Glazier43, R. W. Gothe37, K. A. Griffioen47, M. Guidal21, L. Guo11, K. Hafidi1, H. Hakobyan40,48, M. Hattawy31, T. B. Hayward7, D. Heddle6,39, K. Hicks30, A. Hobart21, M. Holtrop27, I. Illari13, D. G. Ireland43, D. Jenkins45, H. S. Jo23, D. Keller46, A. Khanal11, M. Khandaker29,*, A. Kim7, W. Kim23, F. J. Klein4, V. Klimenko7, A. Kripko32, V. Kubarovsky39,33, V. Lagerquist31, L. Lanza17, M. Leali41,20, P. Lenisa14,10, K. Livingston43, I. J. D. MacGregor43, D. Marchand21, L. Marsicano16, V. Mascagna41,20, B. McKinnon43, Z. E. Meziani1, S. Migliorati41,20, T. Mineeva40, M. Mirazita15, C. Munoz Camacho21, P. Nadel-Turonski39, K. Neupane37, S. Niccolai21,13, T. O'Connell7, M. Osipenko16, P. Pandey31, M. Paolone28, L. L. Pappalardo14,10, R. Paremuzyan39, E. Pasyuk39, S. J. Paul49, W. Phelps6, N. Pilleux21, O. Pogorelko26, J. Poudel31, J. W. Price2, Y. Prok31,46, B. A. Raue11, T. Reed11, M. Ripani16, J. Ritman22, J. Rowley30, F. Sabatié5, C. Salgado29, A. Schmidt13, R. A. Schumacher3, Y. G. Sharabian39, E. V. Shirokov36, U. Shrestha7, P. Simmerling7, D. Sokhan5,43, N. Sparveris38, S. Stepanyan39, I. I. Strakovsky13, S. Strauch37,13, J. A. Tan23, R. Tyson43, M. Ungaro39,33, S. Vallarino14, L. Venturelli41,20, H. Voskanyan48, E. Voutier21, D. Watts44, K. Wei7, X. Wei39, M. H. Wood50, B. Yale47, N. Zachariou44, J. Zhang46, and V. Ziegler39 (CLAS Collaboration)

  • 1Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2California State University, Dominguez Hills, Carson, California 90747, USA
  • 3Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
  • 4Catholic University of America, Washington, D.C. 20064, USA
  • 5IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
  • 6Christopher Newport University, Newport News, Virginia 23606, USA
  • 7University of Connecticut, Storrs, Connecticut 06269, USA
  • 8Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA
  • 9Fairfield University, Fairfield, Connecticut 06824, USA
  • 10Universita' di Ferrara, 44121 Ferrara, Italy
  • 11Florida International University, Miami, Florida 33199, USA
  • 12Florida State University, Tallahassee, Florida 32306, USA
  • 13The George Washington University, Washington, D.C. 20052, USA
  • 14INFN, Sezione di Ferrara, 44100 Ferrara, Italy
  • 15INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
  • 16INFN, Sezione di Genova, 16146 Genova, Italy
  • 17INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
  • 18INFN, Sezione di Torino, 10125 Torino, Italy
  • 19INFN, Sezione di Catania, 95123 Catania, Italy
  • 20INFN, Sezione di Pavia, 27100 Pavia, Italy
  • 21Universit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
  • 22Institute fur Kernphysik (Juelich), Juelich, Germany
  • 23Kyungpook National University, Daegu 41566, Republic of Korea
  • 24Lamar University, 4400 MLK Blvd, PO Box 10046, Beaumont, Texas 77710, USA
  • 25Mississippi State University, Mississippi State, Mississippi 39762-5167, USA
  • 26National Research Centre Kurchatov Institute - ITEP, Moscow, 117259, Russia
  • 27University of New Hampshire, Durham, New Hampshire 03824-3568, USA
  • 28New Mexico State University, P.O. Box 30001, Las Cruces, New Mexico 88003, USA
  • 29Norfolk State University, Norfolk, Virginia 23504, USA
  • 30Ohio University, Athens, Ohio 45701, USA
  • 31Old Dominion University, Norfolk, Virginia 23529, USA
  • 32II Physikalisches Institut der Universitaet Giessen, 35392 Giessen, Germany
  • 33Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
  • 34University of Richmond, Richmond, Virginia 23173, USA
  • 35Universita' di Roma Tor Vergata, 00133 Rome Italy
  • 36Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
  • 37University of South Carolina, Columbia, South Carolina 29208, USA
  • 38Temple University, Philadelphia, Pennsylvania 19122, USA
  • 39Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
  • 40Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
  • 41Università degli Studi di Brescia, 25123 Brescia, Italy
  • 42Universit'a degli Studi di Messina, 98166 Messina, Italy
  • 43University of Glasgow, Glasgow G12 8QQ, United Kingdom
  • 44University of York, York YO10 5DD, United Kingdom
  • 45Virginia Tech, Blacksburg, Virginia 24061-0435, USA
  • 46University of Virginia, Charlottesville, Virginia 22901, USA
  • 47College of William and Mary, Williamsburg, Virginia 23187-8795, USA
  • 48Yerevan Physics Institute, 375036 Yerevan, Armenia
  • 49University of California, Riverside, California, 92521, USA
  • 50Canisius College, Buffalo, New York, USA
  • 51Lawrence Livermore National Laboratory, Livermore, California 94550, USA

  • *Current address: Idaho State University, Pocatello, Idaho 83209, USA.
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Phys. Rev. C 105, L022201 – Published 18 February, 2022

DOI: https://doi.org/10.1103/PhysRevC.105.L022201

Abstract

The first results on the σLT′ structure function in exclusive π0p electroproduction at invariant masses of the final state of 1.5GeV<W<1.8GeV and in the range of photon virtualities 0.4GeV2<Q2<1.0GeV2 were obtained from data on beam spin asymmetries and differential cross sections measured with the CLAS detector at Jefferson Lab. The Legendre moments determined from the σLT′ structure function have demonstrated sensitivity to the contributions from the nucleon resonances in the second and third resonance regions. These new data on the beam spin asymmetries in π0p electroproduction extend the opportunities for the extraction of the nucleon resonance electro-excitation amplitudes in the mass range above 1.6 GeV.

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Phys. Rev. C 105, L022201– Published 18 February, 2022
  • Received 25 December 2021
  • Accepted 31 January 2022
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