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Title: Rosenbluth Separation of the π 0 Electroproduction Cross Section Off the Neutron

Abstract

Here, we report the first longitudinal/transverse separation of the deeply virtual exclusive $$\pi^0$$ electroproduction cross section off the neutron and coherent deuteron. Furthemore, 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 GeV$^2$ and $$x_B$$=0.36. The $$ed \to ed\pi^0$$ cross sections are found compatible with the small values expected from theoretical models. The $$en \to en\pi^0$$ cross sections show a dominance from the response to transversely polarized photons, and are in good agreement with calculations based on the transversity GPDs of the nucleon. By combining our 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.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Mississippi State Univ., Starkville, MS (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Contributing Org.:
Jefferson Lab Hall A Collaboration
OSTI Identifier:
1361037
Alternate Identifier(s):
OSTI ID: 1361117; OSTI ID: 1377068; OSTI ID: 1604527
Report Number(s):
JLAB-PHY-17-2435; DOE/OR/23177-4128; arXiv:1702.00835
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1702736
Grant/Contract Number:  
AC05-060R23177; AC02-06CH11357; FG02-07ER41528
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

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., Martí Jiménez-Argüello, A., Meddi, F., Meekins, D., Michaels, R., Mihovilovic, M., Muangma, N., Muñoz Camacho, C., 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., Sabatié, 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., and Zhu, P. Rosenbluth Separation of the π0 Electroproduction Cross Section Off the Neutron. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.118.222002.
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., Martí Jiménez-Argüello, A., Meddi, F., Meekins, D., Michaels, R., Mihovilovic, M., Muangma, N., Muñoz Camacho, C., 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., Sabatié, 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. Rosenbluth Separation of the π0 Electroproduction Cross Section Off the Neutron. United States. doi:10.1103/PhysRevLett.118.222002.
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., Martí Jiménez-Argüello, A., Meddi, F., Meekins, D., Michaels, R., Mihovilovic, M., Muangma, N., Muñoz Camacho, C., 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., Sabatié, 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., and Zhu, P. Thu . "Rosenbluth Separation of the π0 Electroproduction Cross Section Off the Neutron". United States. doi:10.1103/PhysRevLett.118.222002. https://www.osti.gov/servlets/purl/1361037.
@article{osti_1361037,
title = {Rosenbluth Separation of the π0 Electroproduction Cross Section Off the Neutron},
author = {Mazouz, M. and Ahmed, Z. and Albataineh, H. and Allada, K. and Aniol, K. A. and Bellini, V. and Benali, M. and Boeglin, W. and Bertin, P. and Brossard, M. and Camsonne, A. and Canan, M. and Chandavar, S. and Chen, C. and Chen, J. -P. and Defurne, M. and de Jager, C. W. and de Leo, R. and Desnault, C. and Deur, A. and El Fassi, L. and Ent, R. and Flay, D. and Friend, M. and Fuchey, E. and Frullani, S. and Garibaldi, F. and Gaskell, D. and Giusa, A. and Glamazdin, O. and Golge, S. and Gomez, J. and Hansen, O. and Higinbotham, D. and Holmstrom, T. and Horn, T. and Huang, J. and Huang, M. and Huber, G. M. and Hyde, C. E. and Iqbal, S. and Itard, F. and Kang, Ho. and Kang, Hy. and Kelleher, A. and Keppel, C. and Koirala, S. and Korover, I. and LeRose, J. J. and Lindgren, R. and Long, E. and Magne, M. and Mammei, J. and Margaziotis, D. J. and Markowitz, P. and Martí Jiménez-Argüello, A. and Meddi, F. and Meekins, D. and Michaels, R. and Mihovilovic, M. and Muangma, N. and Muñoz Camacho, C. and Nadel-Turonski, P. and Nuruzzaman, N. and Paremuzyan, R. and Puckett, A. and Punjabi, V. and Qiang, Y. and Rakhman, A. and Rashad, M. N. H. and Riordan, S. and Roche, J. and Russo, G. and Sabatié, F. and Saenboonruang, K. and Saha, A. and Sawatzky, B. and Selvy, L. and Shahinyan, A. and Sirca, S. and Solvignon, P. and Sperduto, M. L. and Subedi, R. and Sulkosky, V. and Sutera, C. and Tobias, W. A. and Urciuoli, G. M. and Wang, D. and Wojtsekhowski, B. and Yao, H. and Ye, Z. and Zana, L. and Zhan, X. and Zhang, J. and Zhao, B. and Zhao, Z. and Zheng, X. and Zhu, P.},
abstractNote = {Here, we report the first longitudinal/transverse separation of the deeply virtual exclusive $\pi^0$ electroproduction cross section off the neutron and coherent deuteron. Furthemore, 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 GeV$^2$ and $x_B$=0.36. The $ed \to ed\pi^0$ cross sections are found compatible with the small values expected from theoretical models. The $en \to en\pi^0$ cross sections show a dominance from the response to transversely polarized photons, and are in good agreement with calculations based on the transversity GPDs of the nucleon. By combining our 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.},
doi = {10.1103/PhysRevLett.118.222002},
journal = {Physical Review Letters},
number = 22,
volume = 118,
place = {United States},
year = {2017},
month = {6}
}

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