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Title: Measurement of the generalized form factors near threshold via γ*p → nπ+ at high Q2

Abstract

We report the first extraction of the pion-nucleon multipoles near the production threshold for the nπ+ channel at relatively high momentum transfer (Q2 up to 4.2 GeV2). The dominance of the s-wave transverse multipole (E0+), expected in this region, allowed us to access the generalized form factor G1 within the light-cone sum rule (LCSR) framework as well as the axial form factor GA. The data analyzed in this work were collected by the nearly 4π CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the π-N multipole E0+/GD were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q2 independent.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1040720
Report Number(s):
JLAB-PHY-12-1412; DOE/OR/23177-1959; arXiv:1201.0903
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1202538
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C, Nuclear Physics
Additional Journal Information:
Journal Volume: 85; Journal Issue: 3; Related Information: JLAB Experiment Number: E99-107; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DIFFERENTIAL CROSS SECTIONS; ELECTRON BEAMS; FORM FACTORS; LIGHT CONE; MOMENTUM TRANSFER; MULTIPOLES; PRODUCTION; PROTONS; SPECTROMETERS; SUM RULES

Citation Formats

Park, K., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., 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., El Alaoui, A., El Fassi, L., Euginio, P., Fedotov, G., Fradi, A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Graham, L., Griffioen, K. A., 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., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khertarpal, P., Kim, A., Kim, W., Klein, F. J., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, J. D., Markov, N., Mayer, M., McKinnon, B., Mestayer, M. D., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I, Paolone, M., Pappalardo, L., Paremuzyan, R., Park, S., Anefalos Pereira, S., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabati ee, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Trivedi, A., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voutier, E., Watts, D. P., Weygand, D. P., Wood, M. H., Zachariou, N., Zhao, B., and Zhao, Z. W. Measurement of the generalized form factors near threshold via γ*p → nπ+ at high Q2. United States: N. p., 2012. Web. doi:10.1103/PhysRevC.85.035208.
Park, K., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., 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., El Alaoui, A., El Fassi, L., Euginio, P., Fedotov, G., Fradi, A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Graham, L., Griffioen, K. A., 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., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khertarpal, P., Kim, A., Kim, W., Klein, F. J., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, J. D., Markov, N., Mayer, M., McKinnon, B., Mestayer, M. D., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I, Paolone, M., Pappalardo, L., Paremuzyan, R., Park, S., Anefalos Pereira, S., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabati ee, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Trivedi, A., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voutier, E., Watts, D. P., Weygand, D. P., Wood, M. H., Zachariou, N., Zhao, B., & Zhao, Z. W. Measurement of the generalized form factors near threshold via γ*p → nπ+ at high Q2. United States. https://doi.org/10.1103/PhysRevC.85.035208
Park, K., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., 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., El Alaoui, A., El Fassi, L., Euginio, P., Fedotov, G., Fradi, A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Graham, L., Griffioen, K. A., 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., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khertarpal, P., Kim, A., Kim, W., Klein, F. J., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, J. D., Markov, N., Mayer, M., McKinnon, B., Mestayer, M. D., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I, Paolone, M., Pappalardo, L., Paremuzyan, R., Park, S., Anefalos Pereira, S., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabati ee, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Trivedi, A., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voutier, E., Watts, D. P., Weygand, D. P., Wood, M. H., Zachariou, N., Zhao, B., and Zhao, Z. W. Mon . "Measurement of the generalized form factors near threshold via γ*p → nπ+ at high Q2". United States. https://doi.org/10.1103/PhysRevC.85.035208. https://www.osti.gov/servlets/purl/1040720.
@article{osti_1040720,
title = {Measurement of the generalized form factors near threshold via γ*p → nπ+ at high Q2},
author = {Park, K. and Adhikari, K. P. and Adikaram, D. and Anghinolfi, M. and Baghdasaryan, H. and Ball, J. and Battaglieri, M. and Batourine, V. and Bedlinskiy, I. and Bennett, R. P. and Biselli, A. S. and Bookwalter, C. and Boiarinov, S. and Branford, D. and Briscoe, W. J. and Brooks, W. K. and Burkert, V. D. and Carman, D. S. and Celentano, A. and Chandavar, S. and Charles, G. and Cole, P. L. and Contalbrigo, M. and Crede, V. and D'Angelo, A. and Daniel, A. and Dashyan, N. and De Vita, R. and De Sanctis, E. and Deur, A. and Djalali, C. and Doughty, D. and Dupre, R. and El Alaoui, A. and El Fassi, L. and Euginio, P. and Fedotov, G. and Fradi, A. and Gabrielyan, M. Y. and Gevorgyan, N. and Gilfoyle, G. P. and Giovanetti, K. L. and Girod, F. X. and Goetz, J. T. and Gohn, W. and Golovatch, E. and Graham, L. and Griffioen, K. A. and Guidal, M. and Guo, L. and Hafidi, K. and Hakobyan, H. and Hanretty, C. and Heddle, D. and Hicks, K. and Holtrop, M. and Ilieva, Y. and Ireland, D. G. and Ishkhanov, B. S. and Isupov, E. L. and Jenkins, D. and Jo, H. S. and Joo, K. and Khandaker, M. and Khertarpal, P. and Kim, A. and Kim, W. and Klein, F. J. and Kubarovsky, A. and Kubarovsky, V. and Kuhn, S. E. and Kuleshov, S. V. and Kvaltine, N. D. and Livingston, K. and Lu, H. Y. and MacGregor, J. D. and Markov, N. and Mayer, M. and McKinnon, B. and Mestayer, M. D. and Meyer, C. A. and Mineeva, T. and Mirazita, M. and Mokeev, V. and Moutarde, H. and Munevar, E. and Nadel-Turonski, P. and Nasseripour, R. and Niccolai, S. and Niculescu, G. and Niculescu, I. and Osipenko, M. and Ostrovidov, A. I and Paolone, M. and Pappalardo, L. and Paremuzyan, R. and Park, S. and Anefalos Pereira, S. and Phelps, E. and Pisano, S. and Pogorelko, O. and Pozdniakov, S. and Price, J. W. and Procureur, S. and Prok, Y. and Ricco, G. and Rimal, D. and Ripani, M. and Ritchie, B. G. and Rosner, G. and Rossi, P. and Sabati ee, F. and Saini, M. S. and Salgado, C. and Schott, D. and Schumacher, R. A. and Seraydaryan, H. and Sharabian, Y. G. and Smith, E. S. and Smith, G. D. and Sober, D. I. and Sokhan, D. and Stepanyan, S. S. and Stepanyan, S. and Stoler, P. and Strakovsky, I. I. and Strauch, S. and Taiuti, M. and Tang, W. and Taylor, C. E. and Tian, Y. and Tkachenko, S. and Trivedi, A. and Ungaro, M. and Vernarsky, B. and Vlassov, A. V. and Voutier, E. and Watts, D. P. and Weygand, D. P. and Wood, M. H. and Zachariou, N. and Zhao, B. and Zhao, Z. W.},
abstractNote = {We report the first extraction of the pion-nucleon multipoles near the production threshold for the nπ+ channel at relatively high momentum transfer (Q2 up to 4.2 GeV2). The dominance of the s-wave transverse multipole (E0+), expected in this region, allowed us to access the generalized form factor G1 within the light-cone sum rule (LCSR) framework as well as the axial form factor GA. The data analyzed in this work were collected by the nearly 4π CEBAF Large Acceptance Spectrometer (CLAS) using a 5.754-GeV electron beam on a proton target. The differential cross section and the π-N multipole E0+/GD were measured using two different methods, the LCSR and a direct multipole fit. The results from the two methods are found to be consistent and almost Q2 independent.},
doi = {10.1103/PhysRevC.85.035208},
journal = {Physical Review C, Nuclear Physics},
number = 3,
volume = 85,
place = {United States},
year = {Mon Mar 26 00:00:00 EDT 2012},
month = {Mon Mar 26 00:00:00 EDT 2012}
}

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Works referencing / citing this record:

Nucleon Form Factors and Distribution Amplitudes in QCD
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