Abstract
We report the measurement of near-threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range Q2 from 2 to 4.5 GeV2 and W from 1.08 to 1.16 GeV. These measurements allow us to access the dominant pion-nucleon s-wave multipoles E0+ and S0+ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors G1π0p(Q2) and G2π0p(Q2). The data are compared to these generalized form factors and the results for G1π0p(Q2) are found to be in good agreement with the LCSR predictions, but the level of agreement with G2π0p(Q2) is poor.
Original language | English (US) |
---|---|
Article number | 045205 |
Journal | Physical Review C - Nuclear Physics |
Volume | 87 |
Issue number | 4 |
DOIs | |
State | Published - Apr 15 2013 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Near-threshold neutral pion electroproduction at high momentum transfers and generalized form factors. / Khetarpal, P.; Stoler, P.; Aznauryan, I. G.; Kubarovsky, V.; Adhikari, K. P.; Adikaram, D.; Aghasyan, M.; Amaryan, M. J.; Anderson, M. D.; Anefalos Pereira, S.; Anghinolfi, M.; Avakian, H.; Baghdasaryan, H.; Ball, J.; Baltzell, N. A.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Bono, J.; Boiarinov, S.; Briscoe, W. J.; Brooks, W. K.; Burkert, V. D.; Carman, D. S.; Celentano, A.; Charles, G.; Cole, P. L.; Contalbrigo, M.; Crede, V.; D'Angelo, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Deur, A.; Djalali, C.; Doughty, D.; Dugger, Michael; Dupre, R.; Egiyan, H.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Fersch, R.; Fleming, J. A.; Fradi, A.; Gabrielyan, M. Y.; Garçon, M.; Gevorgyan, N.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Goetz, J. T.; Gohn, W.; Golovatch, E.; Gothe, R. W.; Griffioen, K. A.; Guegan, B.; Guidal, M.; Guo, L.; Hafidi, K.; Hakobyan, H.; Hanretty, C.; Harrison, N.; Hicks, K.; Ho, D.; Holtrop, M.; Hyde, C. E.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jo, H. S.; Joo, K.; Keller, D.; Khandaker, M.; Kim, A.; Kim, W.; Klein, F. J.; Koirala, S.; Kubarovsky, A.; Kuleshov, S. V.; Kvaltine, N. D.; Lewis, S.; Livingston, K.; Lu, H. Y.; Macgregor, I. J.D.; Mao, Y.; Martinez, D.; Mayer, M.; McKinnon, B.; Meyer, C. A.; Mineeva, T.; Mirazita, M.; Mokeev, V.; Montgomery, R. A.; Moutarde, H.; Munevar, E.; Munoz Camacho, C.; Nadel-Turonski, P.; Nasseripour, R.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Osipenko, M.; Ostrovidov, A. I.; Pappalardo, L. L.; Paremuzyan, R.; Park, K.; Park, S.; Pasyuk, E.; Phelps, E.; Phillips, J. J.; Pisano, S.; Pogorelko, O.; Pozdniakov, S.; Price, J. W.; Procureur, S.; Protopopescu, D.; Puckett, A. J.R.; Raue, B. A.; Ricco, G.; Rimal, D.; Ripani, M.; Rosner, G.; Rossi, P.; Sabatié, F.; Saini, M. S.; Salgado, C.; Saylor, N. A.; 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.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Tang, W.; Taylor, C. E.; Tkachenko, S.; Ungaro, M.; Vernarsky, B.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Weinstein, L. B.; Weygand, D. P.; Wood, M. H.; Zachariou, N.; Zhang, J.; Zhao, Z. W.; Zonta, I.
In: Physical Review C - Nuclear Physics, Vol. 87, No. 4, 045205, 15.04.2013.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Near-threshold neutral pion electroproduction at high momentum transfers and generalized form factors
AU - Khetarpal, P.
AU - Stoler, P.
AU - Aznauryan, I. G.
AU - Kubarovsky, V.
AU - Adhikari, K. P.
AU - Adikaram, D.
AU - Aghasyan, M.
AU - Amaryan, M. J.
AU - Anderson, M. D.
AU - Anefalos Pereira, S.
AU - Anghinolfi, M.
AU - Avakian, H.
AU - Baghdasaryan, H.
AU - Ball, J.
AU - Baltzell, N. A.
AU - Battaglieri, M.
AU - Batourine, V.
AU - Bedlinskiy, I.
AU - Biselli, A. S.
AU - Bono, J.
AU - Boiarinov, S.
AU - Briscoe, W. J.
AU - Brooks, W. K.
AU - Burkert, V. D.
AU - Carman, D. S.
AU - Celentano, A.
AU - Charles, G.
AU - Cole, P. L.
AU - Contalbrigo, M.
AU - Crede, V.
AU - D'Angelo, A.
AU - Dashyan, N.
AU - De Vita, R.
AU - De Sanctis, E.
AU - Deur, A.
AU - Djalali, C.
AU - Doughty, D.
AU - Dugger, Michael
AU - Dupre, R.
AU - Egiyan, H.
AU - El Alaoui, A.
AU - El Fassi, L.
AU - Eugenio, P.
AU - Fedotov, G.
AU - Fegan, S.
AU - Fersch, R.
AU - Fleming, J. A.
AU - Fradi, A.
AU - Gabrielyan, M. Y.
AU - Garçon, M.
AU - Gevorgyan, N.
AU - Gilfoyle, G. P.
AU - Giovanetti, K. L.
AU - Girod, F. X.
AU - Goetz, J. T.
AU - Gohn, W.
AU - Golovatch, E.
AU - Gothe, R. W.
AU - Griffioen, K. A.
AU - Guegan, B.
AU - Guidal, M.
AU - Guo, L.
AU - Hafidi, K.
AU - Hakobyan, H.
AU - Hanretty, C.
AU - Harrison, N.
AU - Hicks, K.
AU - Ho, D.
AU - Holtrop, M.
AU - Hyde, C. E.
AU - Ilieva, Y.
AU - Ireland, D. G.
AU - Ishkhanov, B. S.
AU - Isupov, E. L.
AU - Jo, H. S.
AU - Joo, K.
AU - Keller, D.
AU - Khandaker, M.
AU - Kim, A.
AU - Kim, W.
AU - Klein, F. J.
AU - Koirala, S.
AU - Kubarovsky, A.
AU - Kuleshov, S. V.
AU - Kvaltine, N. D.
AU - Lewis, S.
AU - Livingston, K.
AU - Lu, H. Y.
AU - Macgregor, I. J.D.
AU - Mao, Y.
AU - Martinez, D.
AU - Mayer, M.
AU - McKinnon, B.
AU - Meyer, C. A.
AU - Mineeva, T.
AU - Mirazita, M.
AU - Mokeev, V.
AU - Montgomery, R. A.
AU - Moutarde, H.
AU - Munevar, E.
AU - Munoz Camacho, C.
AU - Nadel-Turonski, P.
AU - Nasseripour, R.
AU - Niccolai, S.
AU - Niculescu, G.
AU - Niculescu, I.
AU - Osipenko, M.
AU - Ostrovidov, A. I.
AU - Pappalardo, L. L.
AU - Paremuzyan, R.
AU - Park, K.
AU - Park, S.
AU - Pasyuk, E.
AU - Phelps, E.
AU - Phillips, J. J.
AU - Pisano, S.
AU - Pogorelko, O.
AU - Pozdniakov, S.
AU - Price, J. W.
AU - Procureur, S.
AU - Protopopescu, D.
AU - Puckett, A. J.R.
AU - Raue, B. A.
AU - Ricco, G.
AU - Rimal, D.
AU - Ripani, M.
AU - Rosner, G.
AU - Rossi, P.
AU - Sabatié, F.
AU - Saini, M. S.
AU - Salgado, C.
AU - Saylor, N. A.
AU - Schott, D.
AU - Schumacher, R. A.
AU - Seder, E.
AU - Seraydaryan, H.
AU - Sharabian, Y. G.
AU - Smith, G. D.
AU - Sober, D. I.
AU - Sokhan, D.
AU - Stepanyan, S. S.
AU - Stepanyan, S.
AU - Strakovsky, I. I.
AU - Strauch, S.
AU - Taiuti, M.
AU - Tang, W.
AU - Taylor, C. E.
AU - Tkachenko, S.
AU - Ungaro, M.
AU - Vernarsky, B.
AU - Voskanyan, H.
AU - Voutier, E.
AU - Walford, N. K.
AU - Weinstein, L. B.
AU - Weygand, D. P.
AU - Wood, M. H.
AU - Zachariou, N.
AU - Zhang, J.
AU - Zhao, Z. W.
AU - Zonta, I.
N1 - Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2013/4/15
Y1 - 2013/4/15
N2 - We report the measurement of near-threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range Q2 from 2 to 4.5 GeV2 and W from 1.08 to 1.16 GeV. These measurements allow us to access the dominant pion-nucleon s-wave multipoles E0+ and S0+ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors G1π0p(Q2) and G2π0p(Q2). The data are compared to these generalized form factors and the results for G1π0p(Q2) are found to be in good agreement with the LCSR predictions, but the level of agreement with G2π0p(Q2) is poor.
AB - We report the measurement of near-threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range Q2 from 2 to 4.5 GeV2 and W from 1.08 to 1.16 GeV. These measurements allow us to access the dominant pion-nucleon s-wave multipoles E0+ and S0+ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors G1π0p(Q2) and G2π0p(Q2). The data are compared to these generalized form factors and the results for G1π0p(Q2) are found to be in good agreement with the LCSR predictions, but the level of agreement with G2π0p(Q2) is poor.
UR - http://www.scopus.com/inward/record.url?scp=84877145248&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877145248&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.87.045205
DO - 10.1103/PhysRevC.87.045205
M3 - Article
AN - SCOPUS:84877145248
VL - 87
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 4
M1 - 045205
ER -