arXiv · 2112.07732
Polarized Structure Function $\sigma_{LT'}$ from $\pi^0 p$ Electroproduction Data in the Resonance Region at $0.4$ GeV$^2 < Q^2 < 1.0$ GeV$^2$
Abstract
The first results on the $\sigma_{LT'}$ structure function in exclusive $\pi^0p$ 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 GeV$^2 < Q^2 < 1.0$ GeV$^2$ 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 $\pi^0p$ electroproduction extend the opportunities for the extraction of the nucleon resonance electroexcitation amplitudes in the mass range above 1.6 GeV.
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E. L. Isupov, V. D. Burkert, A. A. Golubenko, K. Joo, N. S. Markov, V. I. Mokeev, L. C. Smith, W. R. Armstrong, H. Atac, H. Avakian, N. A. Baltzell, L. Barion, M. Battaglieri, I. Bedlinskiy, F. Benmokhtar, A. Bianconi, L. Biondo, A. S. Biselli, M. Bondi, F. Bossù, W. J. Briscoe, W. K. Brooks, D. Bulumulla, R. A. Capobianco, D. S. Carman, J. C. Carvajal, P. Chatagnon, V. Chesnokov, G. Ciullo, P. L. Cole, B. A. Clary, 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, D. I. Glazier, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, K. Hafidi, H. Hakobyan, M. Hattawy, T. B. Hayward, D. Heddle, K. Hicks, A. Hobart, M. Holtrop, I. Illari, D. G. Ireland, D. Jenkins, H. S. Jo, D. Keller, A. Khanal, M. Khandaker, A. Kim, W. Kim, F. J. Klein, V. Klimenko, 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, Z. E. Meziani, S. Migliorati, T. Mineeva, M. Mirazita, C. Munoz Camacho, P. Nadel-Turonski, K. Neupane, S. Niccolai, T. O'Connell, M. Osipenko, P. Pandey, M. Paolone, L. L. Pappalardo, R. Paremuzyan. 2021-12-14. Polarized Structure Function $\sigma_{LT'}$ from $\pi^0 p$ Electroproduction Data in the Resonance Region at $0.4$ GeV$^2 < Q^2 < 1.0$ GeV$^2$. https://doi.org/10.1103/physrevc.105.l022201
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