A multidimensional study of the structure function ratio from hard exclusive π+ electro-production off protons in the GPD regime

Diehl, S.; Kim, A.; Joo, K.; Achenbach, P.; Akbar, Z.; Amaryan, M.J.; ATAC, HAMZA; Avagyan, H.; Ayerbe Gayoso, C.; Baashen, L.; Barion, L.; Bashkanov, M.; Battaglieri, M.; Bedlinskiy, I.; Benkel, B.; Benmokhtar, F.; Bianconi, A.; Biselli, A.S.; Bondi, M.; Booth, W.A.; Bossù, F.; Boiarinov, S.; Brinkmann, K.-T.; Briscoe, W.J.; Bueltmann, S.; Bulumulla, D.; Burkert, V.D.; Carman, D.S.; Celentano, A.; Chatagnon, P.; Chesnokov, V.; Chetry, T.; Ciullo, G.; Clash, G.; Cole, P.L.; Contalbrigo, M.; Costantini, G.; D'Angelo, A.; Dashyan, N.; De Vita, R.; Defurne, M.; Deur, A.; Djalali, C.; Dupre, R.; Egiyan, H.; Ehrhart, M.; El Alaoui, A.; El Fassi, L.; Elouadrhiri, L.; Fegan, S.; Filippi, A.; Gavalian, G.; Ghandilyan, Y.; Gilfoyle, G.P.; Glazier, D.I.; Golubenko, A.A.; Gosta, G.; Gothe, R.W.; Gotra, Y.; Griffioen, K.A.; Guidal, M.; Hafidi, K.; Hakobyan, H.; Hattawy, M.; Hayward, T.B.; Heddle, D.; Hobart, A.; Holtrop, M.; Ilieva, Y.; Ireland, D.G.; Isupov, E.L.; Jo, H.S.; Khachatryan, M.; Khanal, A.; Kim, W.; Kripko, A.; Kubarovsky, V.; Lagerquist, V.; Laget, J.-M.; Lanza, L.; Leali, M.; Lee, S.; Lenisa, P.; Li, X.; Livingston, K.; MacGregor, I.J.D.; Marchand, D.; Mascagna, V.; McKinnon, B.; Meziani, Zein-Eddine; Migliorati, S.; Mineeva, T.; Mirazita, M.; Mokeev, V.; Molina, E.; Montgomery, R.A.; Munoz Camacho, C.; Nadel-Turonski, P.; Naidoo, P.; Neupane, K.; Niccolai, S.; Nicol, M.; Niculescu, G.; Osipenko, M.; Ouillon, M.; Pandey, P.; Paolone, Michael; Pappalardo, L.L.; Paremuzyan, R.; Pasyuk, E.; Paul, S.J.; Phelps, W.; Pilleux, N.; Pokhrel, M.; Poudel, J.; Price, J.W.; Prok, Y.; Reed, T.; Richards, J.; Ripani, M.; Ritman, J.; Rossi, P.; Sabatié, F.; Salgado, C.; Schadmand, S.; Schmidt, A.; Sharabian, Y.; Shirokov, E.V.; Shrestha, U.; Simmerling, P.; Sokhan, D.; Sparveris, Nikos; Spreafico, M.; Stepanyan, S.; Strakovsky, I.I.; Strauch, S.; Tan, J.A.; Trotta, N.; Turisini, M.; Tyson, R.; Ungaro, M.; Vallarino, S.; Venturelli, L.; Voskanyan, H.; Voutier, E.; Watts, D.P.; Wei, X.; Williams, R.; Wishart, R.; Wood, M.H.; Zachariou, N.; J. Zhang, J.; Zhao, Z.W.; Zurek, M.

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Journal article

Date

2023-02-13

Author

Diehl, S.
Kim, A.
Joo, K.
Achenbach, P.
Akbar, Z.
Amaryan, M.J.
ATAC, HAMZA

Avagyan, H.
Ayerbe Gayoso, C.
Baashen, L.

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Department

Physics

DOI

https://doi.org/10.1016/j.physletb.2023.137761

Abstract

A multidimensional extraction of the structure function ratio from the hard exclusive reaction above the resonance region has been performed. The study was done based on beam-spin asymmetry measurements using a 10.6 GeV incident electron beam on a liquid-hydrogen target and the CLAS12 spectrometer at Jefferson Lab. The measurements focus on the very forward regime (≪ 1) with a wide kinematic range of in the valence regime (0.17 < < 0.55), and virtualities ranging from 1.5 GeV2 up to 6 GeV2. The results and their comparison to theoretical models based on Generalized Parton Distributions demonstrate the sensitivity to chiral-odd GPDs and the directly related tensor charge of the nucleon. In addition, the data is compared to an extension of a Regge formalism at high photon virtualities. It was found that the Regge model provides a better description at low, while the GPD model is more appropriate at high.

Citation

S. Diehl, A. Kim, K. Joo, P. Achenbach, Z. Akbar, M.J. Amaryan, H. Atac, H. Avagyan, C. Ayerbe Gayoso, L. Baashen, L. Barion, M. Bashkanov, M. Battaglieri, I. Bedlinskiy, B. Benkel, F. Benmokhtar, A. Bianconi, A.S. Biselli, M. Bondi, W.A. Booth, F. Bossù, S. Boiarinov, K.-Th. Brinkmann, W.J. Briscoe, S. Bueltmann, D. Bulumulla, V.D. Burkert, D.S. Carman, A. Celentano, P. Chatagnon, V. Chesnokov, T. Chetry, G. Ciullo, G. Clash, P.L. Cole, M. Contalbrigo, G. Costantini, A. D'Angelo, N. Dashyan, R. De Vita, M. Defurne, A. Deur, C. Djalali, R. Dupre, H. Egiyan, M. Ehrhart, A. El Alaoui, L. El Fassi, L. Elouadrhiri, S. Fegan, A. Filippi, G. Gavalian, Y. Ghandilyan, G.P. Gilfoyle, D.I. Glazier, A.A. Golubenko, G. Gosta, R.W. Gothe, Y. Gotra, K.A. Griffioen, M. Guidal, K. Hafidi, H. Hakobyan, M. Hattawy, T.B. Hayward, D. Heddle, A. Hobart, M. Holtrop, Y. Ilieva, D.G. Ireland, E.L. Isupov, H.S. Jo, M. Khachatryan, A. Khanal, W. Kim, A. Kripko, V. Kubarovsky, V. Lagerquist, J.-M. Laget, L. Lanza, M. Leali, S. Lee, P. Lenisa, X. Li, K. Livingston, I. .J .D. MacGregor, D. Marchand, V. Mascagna, B. McKinnon, Z.E. Meziani, S. Migliorati, T. Mineeva, M. Mirazita, V. Mokeev, E. Molina, R.A. Montgomery, C. Munoz Camacho, P. Nadel-Turonski, P. Naidoo, K. Neupane, S. Niccolai, M. Nicol, G. Niculescu, M. Osipenko, M. Ouillon, P. Pandey, M. Paolone, L.L. Pappalardo, R. Paremuzyan, E. Pasyuk, S.J. Paul, W. Phelps, N. Pilleux, M. Pokhrel, J. Poudel, J.W. Price, Y. Prok, T. Reed, J. Richards, M. Ripani, J. Ritman, P. Rossi, F. Sabatié, C. Salgado, S. Schadmand, A. Schmidt, Y. Sharabian, E.V. Shirokov, U. Shrestha, P. Simmerling, D. Sokhan, N. Sparveris, M. Spreafico, S. Stepanyan, I.I. Strakovsky, S. Strauch, J.A. Tan, N. Trotta, M. Turisini, R. Tyson, M. Ungaro, S. Vallarino, L. Venturelli, H. Voskanyan, E. Voutier, D.P. Watts, X. Wei, R. Williams, R. Wishart, M.H. Wood, N. Zachariou, J. Zhang, Z.W. Zhao, M. Zurek, A multidimensional study of the structure function ratio σLT′/σ0 from hard exclusive π+ electro-production off protons in the GPD regime, Physics Letters B, Volume 839, 2023, 137761, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2023.137761.

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Elsevier

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Physics Letters B, Vol. 839

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