Polarized structure function sigma(LT ') from pi(0)p electroproduction data in the resonance region at 0.4 GeV2 < Q(2) < 1.0 GeV2

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.; Boss??, 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.; H. S., Jo; 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. J. 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.; Sabati??, 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.

doi:10.1103/physrevc.105.l022201

The first results on the sigma(LT') structure function in exclusive pi(0)p 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 < Q(2) < 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 determined from the sigma(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 pi(0)p electroproduction extend the opportunities for the extraction of the nucleon resonance electro-excitation amplitudes in the mass range above 1.6 GeV.