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Bedlinskiy I, Kubarovsky V, Niccolai S, et al. Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions. Phys Rev Lett. 2012;109(11):112001doi: 10.1103/PhysRevLett.109.112001.
Bedlinskiy, I., Kubarovsky, V., Niccolai, S., Stoler, P., Adhikari, K. P., Aghasyan, M., Amaryan, M. J., Anghinolfi, M., Avakian, H., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Fleming, J. A., Forest, T. A., Fradi, A., Garçon, M., Gevorgyan, N., Giovanetti, K. L., Girod, F. X., Gohn, W., Gothe, R. W., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, F. J., Koirala, S., Kubarovsky, A., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J., Mao, Y., Markov, N., Martinez, D., Mayer, M., McKinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Anefalos Pereira, S., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Puckett, A. J., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Sabatié, F., Saini, M. S., Salgado, C., Saylor, N., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Ungaro, M., Vineyard, M. F., Vlassov, A., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zachariou, N., Zhang, J., Zhao, Z. W., Zonta, I. (2012). Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions. Physical review letters, 109(11), 112001. https://doi.org/10.1103/PhysRevLett.109.112001
Bedlinskiy, I, et al. "Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions." Physical review letters vol. 109,11 (2012): 112001. doi: https://doi.org/10.1103/PhysRevLett.109.112001
Bedlinskiy I, Kubarovsky V, Niccolai S, Stoler P, Adhikari KP, Aghasyan M, Amaryan MJ, Anghinolfi M, Avakian H, Baghdasaryan H, Ball J, Baltzell NA, Battaglieri M, Bennett RP, Biselli AS, Bookwalter C, Boiarinov S, Briscoe WJ, Brooks WK, Burkert VD, Carman DS, Celentano A, Chandavar S, Charles G, Contalbrigo M, Crede V, D'Angelo A, Daniel A, Dashyan N, De Vita R, De Sanctis E, Deur A, Djalali C, Doughty D, Dupre R, Egiyan H, El Alaoui A, El Fassi L, Elouadrhiri L, Eugenio P, Fedotov G, Fegan S, Fleming JA, Forest TA, Fradi A, Garçon M, Gevorgyan N, Giovanetti KL, Girod FX, Gohn W, Gothe RW, Graham L, Griffioen KA, Guegan B, Guidal M, Guo L, Hafidi K, Hakobyan H, Hanretty C, Heddle D, Hicks K, Holtrop M, Ilieva Y, Ireland DG, Ishkhanov BS, Isupov EL, Jo HS, Joo K, Keller D, Khandaker M, Khetarpal P, Kim A, Kim W, Klein FJ, Koirala S, Kubarovsky A, Kuhn SE, Kuleshov SV, Kvaltine ND, Livingston K, Lu HY, MacGregor IJ, Mao Y, Markov N, Martinez D, Mayer M, McKinnon B, Meyer CA, Mineeva T, Mirazita M, Mokeev V, Moutarde H, Munevar E, Munoz Camacho C, Nadel-Turonski P, Niculescu G, Niculescu I, Osipenko M, Ostrovidov AI, Pappalardo LL, Paremuzyan R, Park K, Park S, Pasyuk E, Anefalos Pereira S, Phelps E, Pisano S, Pogorelko O, Pozdniakov S, Price JW, Procureur S, Prok Y, Protopopescu D, Puckett AJ, Raue BA, Ricco G, Rimal D, Ripani M, Rosner G, Rossi P, Sabatié F, Saini MS, Salgado C, Saylor N, Schott D, Schumacher RA, Seder E, Seraydaryan H, Sharabian YG, Smith GD, Sober DI, Sokhan D, Stepanyan SS, Stepanyan S, Strauch S, Taiuti M, Tang W, Taylor CE, Tian Y, Tkachenko S, Ungaro M, Vineyard MF, Vlassov A, Voskanyan H, Voutier E, Walford NK, Watts DP, Weinstein LB, Weygand DP, Wood MH, Zachariou N, Zhang J, Zhao ZW, Zonta I. Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions. Phys Rev Lett. 2012 Sep 14;109(11):112001. doi: 10.1103/PhysRevLett.109.112001. Epub 2012 Sep 10. PMID: 23005620.
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Phys Rev Lett. 2012 Sep 14;109(11):112001. doi: 10.1103/PhysRevLett.109.112001. Epub 2012 Sep 10.

Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions.

Physical review letters

I Bedlinskiy, V Kubarovsky, S Niccolai, P Stoler, K P Adhikari, M Aghasyan, M J Amaryan, M Anghinolfi, H Avakian, H Baghdasaryan, J Ball, N A Baltzell, M Battaglieri, R P Bennett, A S Biselli, C Bookwalter, S Boiarinov, W J Briscoe, W K Brooks, V D Burkert, D S Carman, A Celentano, S Chandavar, G Charles, M Contalbrigo, V Crede, A D'Angelo, A Daniel, N Dashyan, R De Vita, E De Sanctis, A Deur, C Djalali, D Doughty, R Dupre, H Egiyan, A El Alaoui, L El Fassi, L Elouadrhiri, P Eugenio, G Fedotov, S Fegan, J A Fleming, T A Forest, A Fradi, M Garçon, N Gevorgyan, K L Giovanetti, F X Girod, W Gohn, R W Gothe, L Graham, K A Griffioen, B Guegan, M Guidal, L Guo, K Hafidi, H Hakobyan, C Hanretty, D Heddle, K Hicks, M Holtrop, Y Ilieva, D G Ireland, B S Ishkhanov, E L Isupov, H S Jo, K Joo, D Keller, M Khandaker, P Khetarpal, A Kim, W Kim, F J Klein, S Koirala, A Kubarovsky, S E Kuhn, S V Kuleshov, N D Kvaltine, K Livingston, H Y Lu, I J D MacGregor, Y Mao, N Markov, D Martinez, M Mayer, B McKinnon, C A Meyer, T Mineeva, M Mirazita, V Mokeev, H Moutarde, E Munevar, C Munoz Camacho, P Nadel-Turonski, G Niculescu, I Niculescu, M Osipenko, A I Ostrovidov, L L Pappalardo, R Paremuzyan, K Park, S Park, E Pasyuk, S Anefalos Pereira, E Phelps, S Pisano, O Pogorelko, S Pozdniakov, J W Price, S Procureur, Y Prok, D Protopopescu, A J R Puckett, B A Raue, G Ricco, D Rimal, M Ripani, G Rosner, P Rossi, F Sabatié, M S Saini, C Salgado, N Saylor, D Schott, R A Schumacher, E Seder, H Seraydaryan, Y G Sharabian, G D Smith, D I Sober, D Sokhan, S S Stepanyan, S Stepanyan, S Strauch, M Taiuti, W Tang, C E Taylor, Ye Tian, S Tkachenko, M Ungaro, M F Vineyard, A Vlassov, H Voskanyan, E Voutier, N K Walford, D P Watts, L B Weinstein, D P Weygand, M H Wood, N Zachariou, J Zhang, Z W Zhao, I Zonta,

Affiliations

  1. Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia.

PMID: 23005620 DOI: 10.1103/PhysRevLett.109.112001

Abstract

Exclusive π(0) electroproduction at a beam energy of 5.75 GeV has been measured with the Jefferson Lab CLAS spectrometer. Differential cross sections were measured at more than 1800 kinematic values in Q(2), x(B), t, and ϕ(π), in the Q(2) range from 1.0 to 4.6  GeV(2), -t up to 2  GeV(2), and x(B) from 0.1 to 0.58. Structure functions σ(T)+ϵσ(L), σ(TT), and σ(LT) were extracted as functions of t for each of 17 combinations of Q(2) and x(B). The data were compared directly with two handbag-based calculations including both longitudinal and transversity generalized parton distributions (GPDs). Inclusion of only longitudinal GPDs very strongly underestimates σ(T)+ϵσ(L) and fails to account for σ(TT) and σ(LT), while inclusion of transversity GPDs brings the calculations into substantially better agreement with the data. There is very strong sensitivity to the relative contributions of nucleon helicity-flip and helicity nonflip processes. The results confirm that exclusive π(0) electroproduction offers direct experimental access to the transversity GPDs.

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