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Title: Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive π 0 production

We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial sin Φ h amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle Φ h of the produced neutral pion. The dependence of this amplitude on Bjorken x and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations.
Authors:
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Publication Date:
Report Number(s):
JLAB-PHY-11-1361; DOE/OR/23177-1736; arXiv:1106.2293
Journal ID: ISSN 0370-2693; TRN: US1105128
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 704; Journal Issue: 5; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; AMPLITUDES; ASYMMETRY; CEBAF ACCELERATOR; CROSS SECTIONS; DISTRIBUTION; ELECTRONS; ELECTROPRODUCTION; HYDROGEN; INCLUSIVE INTERACTIONS; PIONS; PIONS NEUTRAL; POLARIZATION; PRODUCTION; DEEP INELASTIC SCATTERING; SPECTROMETERS; SPIN; TRANSVERSE MOMENTUM
OSTI Identifier:
1026792

Aghasyan, M., Avakian, H., Rossi, P., De Sanctis, E., Hasch, D., Mirazita, M., Adikaram, D., Amaryan, M. J., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Branford, D., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Chandavar, S., Cole, P. L., Collins, P., Contalbrigo, M., Crede, V., DʼAngelo, A., Daniel, A., Dashyan, N., De Vita, R., Deur, A., Dey, B., Dickson, R., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., 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., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guler, N., Guo, L., Hafidi, K., Hanretty, C., Hicks, K., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jawalkar, S. S., Jenkins, D., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kuznetsov, V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McAndrew, J., McKinnon, B., Meyer, C. A., Micherdzinska, A. M., Mokeev, V., Moreno, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Sober, D. I., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tkachenko, S., Ungaro, M., Voskanyan, H., Voutier, E., Watts, D., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zana, L., Zhang, J., Zhao, B., and Zhao, Z. W.. Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive π0 production. United States: N. p., Web. doi:10.1016/j.physletb.2011.09.044.
Aghasyan, M., Avakian, H., Rossi, P., De Sanctis, E., Hasch, D., Mirazita, M., Adikaram, D., Amaryan, M. J., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Branford, D., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Chandavar, S., Cole, P. L., Collins, P., Contalbrigo, M., Crede, V., DʼAngelo, A., Daniel, A., Dashyan, N., De Vita, R., Deur, A., Dey, B., Dickson, R., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., 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., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guler, N., Guo, L., Hafidi, K., Hanretty, C., Hicks, K., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jawalkar, S. S., Jenkins, D., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kuznetsov, V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McAndrew, J., McKinnon, B., Meyer, C. A., Micherdzinska, A. M., Mokeev, V., Moreno, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Sober, D. I., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tkachenko, S., Ungaro, M., Voskanyan, H., Voutier, E., Watts, D., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zana, L., Zhang, J., Zhao, B., & Zhao, Z. W.. Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive π0 production. United States. doi:10.1016/j.physletb.2011.09.044.
Aghasyan, M., Avakian, H., Rossi, P., De Sanctis, E., Hasch, D., Mirazita, M., Adikaram, D., Amaryan, M. J., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Branford, D., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Chandavar, S., Cole, P. L., Collins, P., Contalbrigo, M., Crede, V., DʼAngelo, A., Daniel, A., Dashyan, N., De Vita, R., Deur, A., Dey, B., Dickson, R., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., 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., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guler, N., Guo, L., Hafidi, K., Hanretty, C., Hicks, K., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jawalkar, S. S., Jenkins, D., Jo, H. S., Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kuznetsov, V., Kvaltine, N. D., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McAndrew, J., McKinnon, B., Meyer, C. A., Micherdzinska, A. M., Mokeev, V., Moreno, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Sober, D. I., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tkachenko, S., Ungaro, M., Voskanyan, H., Voutier, E., Watts, D., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zana, L., Zhang, J., Zhao, B., and Zhao, Z. W.. 2011. "Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive π0 production". United States. doi:10.1016/j.physletb.2011.09.044. https://www.osti.gov/servlets/purl/1026792.
@article{osti_1026792,
title = {Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive π0 production},
author = {Aghasyan, M. and Avakian, H. and Rossi, P. and De Sanctis, E. and Hasch, D. and Mirazita, M. and Adikaram, D. and Amaryan, M. J. 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 Branford, D. and Briscoe, W. J. and Bültmann, S. and Burkert, V. D. and Carman, D. S. and Chandavar, S. and Cole, P. L. and Collins, P. and Contalbrigo, M. and Crede, V. and DʼAngelo, A. and Daniel, A. and Dashyan, N. and De Vita, R. and Deur, A. and Dey, B. and Dickson, R. and Djalali, C. and Dodge, G. E. and Doughty, D. and Dupre, R. and Egiyan, H. and El Alaoui, A. and Elouadrhiri, L. and Eugenio, P. and Fedotov, G. and Fegan, S. and Fradi, A. and Gabrielyan, M. Y. and Garçon, M. 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 Gothe, R. W. and Graham, L. and Griffioen, K. A. and Guegan, B. and Guidal, M. and Guler, N. and Guo, L. and Hafidi, K. and Hanretty, C. and Hicks, K. and Holtrop, M. and Hyde, C. E. and Ilieva, Y. and Ireland, D. G. and Isupov, E. L. and Jawalkar, S. S. and Jenkins, D. and Jo, H. S. and Joo, K. and Keller, D. and Khandaker, M. and Khetarpal, P. and Kim, A. and Kim, W. and Klein, A. and Klein, F. J. and Kubarovsky, V. and Kuhn, S. E. and Kuleshov, S. V. and Kuznetsov, V. and Kvaltine, N. D. and Livingston, K. and Lu, H. Y. and MacGregor, I. J. D. and Markov, N. and Mayer, M. and McAndrew, J. and McKinnon, B. and Meyer, C. A. and Micherdzinska, A. M. and Mokeev, V. and Moreno, B. and Moutarde, H. and Munevar, E. and Nadel-Turonski, P. and Ni, A. 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, K. and Park, S. and Pasyuk, E. and Pereira, S. Anefalos and Phelps, E. and Pisano, S. and Pogorelko, O. and Pozdniakov, S. and Price, J. W. and Procureur, S. and Prok, Y. and Protopopescu, D. and Raue, B. A. and Ricco, G. and Rimal, D. and Ripani, M. and Rosner, G. and Sabatié, F. and Saini, M. S. and Salgado, C. and Schott, D. and Schumacher, R. A. and Seder, E. and Seraydaryan, H. and Sharabian, Y. G. and Smith, G. D. and Sober, D. I. and Stepanyan, S. S. and Stepanyan, S. and Stoler, P. and Strakovsky, I. and Strauch, S. and Taiuti, M. and Tang, W. and Taylor, C. E. and Tkachenko, S. and Ungaro, M. and Voskanyan, H. and Voutier, E. and Watts, D. and Weinstein, L. B. and Weygand, D. P. and Wood, M. H. and Zana, L. and Zhang, J. and Zhao, B. and Zhao, Z. W.},
abstractNote = {We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial sin Φh amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle Φh of the produced neutral pion. The dependence of this amplitude on Bjorken x and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations.},
doi = {10.1016/j.physletb.2011.09.044},
journal = {Physics Letters. Section B},
number = 5,
volume = 704,
place = {United States},
year = {2011},
month = {10}
}