We report the first longitudinal-transverse separation of the deeply virtual exclusive pi(0) electroproduction cross section off the neutron and coherent deuteron. The corresponding four structure functions d sigma(L)/dt, d sigma(T)/dt, d sigma(LT)/dt, and d sigma(TT)/dt are extracted as a function of the momentum transfer to the recoil system at Q(2) = 1.75 GeV2 and x(B) = 0.36. The ed -> ed pi(0) cross sections are found compatible with the small values expected from theoretical models. The en -> en pi(0) cross sections show a dominance from the response to transversely polarized photons, and are in good agreement with calculations based on the transversity generalized parton distributions of the nucleon. By combining these results with previous measurements of pi(0) electroproduction off the proton, we present a flavor decomposition of the u and d quark contributions to the cross section.

Rosenbluth Separation of the pi(0) Electroproduction Cross Section Off the Neutron / Mazouz, M.; Ahmed, Z.; Albataineh, H.; Allada, K.; Aniol, K. A.; Bellini, V.; Benali, M.; Boeglin, W.; Bertin, P.; Brossard, M.; Camsonne, A.; Canan, M.; Chandavar, S.; Chen, C.; Chen, J. -P.; Defurne, M.; de Jager, C. W.; de Leo, R.; Desnault, C.; Deur, A.; El Fassi, L.; Ent, R.; Flay, D.; Friend, M.; Fuchey, E.; Frullani, S.; Garibaldi, F.; Gaskell, D.; Giusa, A.; Glamazdin, O.; Golge, S.; Gomez, J.; Hansen, O.; Higinbotham, D.; Holmstrom, T.; Horn, T.; Huang, J.; Huang, M.; Huber, G. M.; Hyde, C. E.; Iqbal, S.; Itard, F.; Kang, Ho.; Kang, Hy.; Kelleher, A.; Keppel, C.; Koirala, S.; Korover, I.; Lerose, J. J.; Lindgren, R.; Long, E.; Magne, M.; Mammei, J.; Margaziotis, D. J.; Markowitz, P.; Marti Jimenez-Arguello, A.; Meddi, F.; Meekins, D.; Michaels, R.; Mihovilovic, M.; Muangma, N.; Camacho, C. Munoz; Nadel-Turonski, P.; Nuruzzaman, N.; Paremuzyan, R.; Puckett, A.; Punjabi, V.; Qiang, Y.; Rakhman, A.; Rashad, M. N. H.; Riordan, S.; Roche, J.; Russo, G.; Sabatie, F.; Saenboonruang, K.; Saha, A.; Sawatzky, B.; Selvy, L.; Shahinyan, A.; Sirca, S.; Solvignon, P.; Sperduto, M. L.; Subedi, R.; Sulkosky, V.; Sutera, C.; Tobias, W. A.; Urciuoli, G. M.; Wang, D.; Wojtsekhowski, B.; Yao, H.; Ye, Z.; Zana, L.; Zhan, X.; Zhang, J.; Zhao, B.; Zhao, Z.; Zheng, X.; Zhu, P.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 118:22(2017). [10.1103/PhysRevLett.118.222002]

Rosenbluth Separation of the pi(0) Electroproduction Cross Section Off the Neutron

Bellini, V.;Garibaldi, F.;Huang, J.;Huang, M.;Meddi, F.;Sutera, C.;Zhan, X.;
2017

Abstract

We report the first longitudinal-transverse separation of the deeply virtual exclusive pi(0) electroproduction cross section off the neutron and coherent deuteron. The corresponding four structure functions d sigma(L)/dt, d sigma(T)/dt, d sigma(LT)/dt, and d sigma(TT)/dt are extracted as a function of the momentum transfer to the recoil system at Q(2) = 1.75 GeV2 and x(B) = 0.36. The ed -> ed pi(0) cross sections are found compatible with the small values expected from theoretical models. The en -> en pi(0) cross sections show a dominance from the response to transversely polarized photons, and are in good agreement with calculations based on the transversity generalized parton distributions of the nucleon. By combining these results with previous measurements of pi(0) electroproduction off the proton, we present a flavor decomposition of the u and d quark contributions to the cross section.
2017
generalized parton distributions; hard exclusive electroproduction; mesons; scattering
01 Pubblicazione su rivista::01a Articolo in rivista
Rosenbluth Separation of the pi(0) Electroproduction Cross Section Off the Neutron / Mazouz, M.; Ahmed, Z.; Albataineh, H.; Allada, K.; Aniol, K. A.; Bellini, V.; Benali, M.; Boeglin, W.; Bertin, P.; Brossard, M.; Camsonne, A.; Canan, M.; Chandavar, S.; Chen, C.; Chen, J. -P.; Defurne, M.; de Jager, C. W.; de Leo, R.; Desnault, C.; Deur, A.; El Fassi, L.; Ent, R.; Flay, D.; Friend, M.; Fuchey, E.; Frullani, S.; Garibaldi, F.; Gaskell, D.; Giusa, A.; Glamazdin, O.; Golge, S.; Gomez, J.; Hansen, O.; Higinbotham, D.; Holmstrom, T.; Horn, T.; Huang, J.; Huang, M.; Huber, G. M.; Hyde, C. E.; Iqbal, S.; Itard, F.; Kang, Ho.; Kang, Hy.; Kelleher, A.; Keppel, C.; Koirala, S.; Korover, I.; Lerose, J. J.; Lindgren, R.; Long, E.; Magne, M.; Mammei, J.; Margaziotis, D. J.; Markowitz, P.; Marti Jimenez-Arguello, A.; Meddi, F.; Meekins, D.; Michaels, R.; Mihovilovic, M.; Muangma, N.; Camacho, C. Munoz; Nadel-Turonski, P.; Nuruzzaman, N.; Paremuzyan, R.; Puckett, A.; Punjabi, V.; Qiang, Y.; Rakhman, A.; Rashad, M. N. H.; Riordan, S.; Roche, J.; Russo, G.; Sabatie, F.; Saenboonruang, K.; Saha, A.; Sawatzky, B.; Selvy, L.; Shahinyan, A.; Sirca, S.; Solvignon, P.; Sperduto, M. L.; Subedi, R.; Sulkosky, V.; Sutera, C.; Tobias, W. A.; Urciuoli, G. M.; Wang, D.; Wojtsekhowski, B.; Yao, H.; Ye, Z.; Zana, L.; Zhan, X.; Zhang, J.; Zhao, B.; Zhao, Z.; Zheng, X.; Zhu, P.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 118:22(2017). [10.1103/PhysRevLett.118.222002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1077238
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