Polarized structure function σ L T ' from π 0 p electroproduction data in the resonance region at 0.4 GeV 2 < Q 2 < 1.0 GeV 2

Journal Article · 17 February 2022 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.105.l022201 · OSTI ID:1845843

Isupov, E. L. ; Burkert, V. D.; Golubenko, A. A.; Joo, K.; Markov, N. S.; Mokeev, V. I.; Smith, L. C.; Armstrong, W. R.; Atac, H.; Avakian, H.; Baltzell, N. A.; Barion, L.; Battaglieri, M.; Bedlinskiy, I.; Benmokhtar, F.; Bianconi, A.; Biondo, L.; Biselli, A. S.; Bondi, M.; Bossù, F. ; Briscoe, W. J.; Brooks, W. K.; Bulumulla, D.; Capobianco, R. A.; Carman, D. S.; Carvajal, J. C.; Chatagnon, P.; Chesnokov, V.; Ciullo, G.; Cole, P. L.; Clary, B. A.; Contalbrigo, M.; Costantini, G.; D'Angelo, A.; Dashyan, N.; De Vita, R.; Defurne, M.; Deur, A.; Diehl, S.; Djalali, C.; Dupre, R.; Egiyan, H.; El Alaoui, A.; El Fassi, L.; Elouadrhiri, L.; Eugenio, P.; Fegan, S.; Filippi, A.; Gavalian, G.; Gilfoyle, G. P.; Glazier, D. I.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Guo, L.; Hafidi, K.; Hakobyan, H.; Hattawy, M.; Hayward, T. B.; Heddle, D.; Hicks, K.; Hobart, A.; Holtrop, M.; Illari, I.; Ireland, D. G.; Jenkins, D.; Jo, H. S.; Keller, D.; Khanal, A.; Khandaker, M.; Kim, A.; Kim, W.; Klein, F. J.; Klimenko, V.; Kripko, A.; Kubarovsky, V.; Lagerquist, V.; Lanza, L.; Leali, M.; Lenisa, P.; Livingston, K.; MacGregor, I. D.; Marchand, D.; Marsicano, L.; Mascagna, V.; McKinnon, B.; Meziani, Z. E.; Migliorati, S.; Mineeva, T.; Mirazita, M.; Munoz Camacho, C.; Nadel-Turonski, P.; Neupane, K.; Niccolai, S.; O'Connell, T.; Osipenko, M.; Pandey, P.; Paolone, M.; Pappalardo, L. L.; Paremuzyan, R.; Pasyuk, E.; Paul, S. J.; Phelps, W.; Pilleux, N.; Pogorelko, O.; Poudel, J.; Price, J. W.; Prok, Y.; Raue, B. A.; Reed, T.; Ripani, M.; Ritman, J.; Rowley, J.; Sabatié, F.; Salgado, C.; Schmidt, A.; Schumacher, R. A.; Sharabian, Y. G.; Shirokov, E. V.; Shrestha, U.; Simmerling, P.; Sokhan, D.; Sparveris, N.; Stepanyan, S.; Strakovsky, I. I.; Strauch, S.; Tan, J. A.; Tyson, R.; Ungaro, M.; Vallarino, S.; Venturelli, L.; Voskanyan, H.; Voutier, E.; Watts, D.; Wei, K.; Wei, X.; Wood, M. H.; Yale, B.; Zachariou, N.; Zhang, J.; Ziegler, V.

The first results on the σ_LT' structure function in exclusive π⁰p electroproduction at invariant masses of the final state of 1.5 GeV < W < 1.8 GeV and in the range of photon virtualities 0.4 GeV² < Q² < 1.0 GeV² were obtained from data on beam spin asymmetries and differential cross sections measured with the CLAS detector at Jefferson Lab. The Legendre moments deter- mined from the σ_LT' 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 electroexcitation amplitudes in the mass range above 1.6 GeV.

• Research Organization: Mississippi State Univ., Mississippi State, MS (United States); Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Contributing Organization: CLAS Collaboration
• Grant/Contract Number: AC05-06OR23177; FG02-04ER41309; FG02-07ER41528
• OSTI ID: 1845843
• Report Number(s): DOE/OR/23177-5374; JLAB-PHY-21-3552; arXiv:2112.07732
• Journal Information: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 2 Vol. 105; ISSN 2469-9985
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English