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Title: Measurement of the beam asymmetry Σ for π 0 and η photoproduction on the proton at E γ = 9 GeV

Abstract

In this paper, we report measurements of the photon beam asymmetry $$\Sigma$$ for the reactions $$\vec{\gamma}p\to p\pi^0$$ and $$\vec{\gamma}p\to p\eta $$ from the GLUEX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous $$\pi^0$$ measurements and are the first $$\eta$$ measurements in this energy regime. Lastly, the results are compared with theoretical predictions based on $t$-channel, quasi-particle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1357419
Report Number(s):
JLAB-PHY-17-2403; DOE/OR/23177-4056; arXiv:1701.08123; JLAB-E-12-06-102
Journal ID: ISSN 2469-9985
Grant/Contract Number:
AC05-06OR23177
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
APS
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Al Ghoul, H., Anassontzis, E. G., Austregesilo, A., Barbosa, F., Barnes, A., Beattie, T. D., Bennett, D. W., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Brooks, W. K., Cannon, B. E., Chernyshov, O., Chudakov, E., Crede, V., Dalton, M. M., Deur, A., Dobbs, S., Dolgolenko, A., Dugger, M., Dzhygadlo, R., Egiyan, H., Eugenio, P., Fanelli, C., Foda, A. M., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gerasimov, A., Gevorgyan, N., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hardin, J., Henderson, A., Huber, G. M., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kamel, M., Klein, F. J., Kliemt, R., Kourkoumeli, C., Kuleshov, S., Kuznetsov, I., Lara, M., Larin, I., Lawrence, D., Levine, W. I., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Mattione, P. T., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Mendez, R., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Moriya, K., Nerling, F., Nigmatkulov, G., Ochoa, N., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pedroni, R., Pennington, M. R., Pentchev, L., Peters, K. J., Pooser, E., Pratt, B., Qiang, Y., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Salgado, C., Schumacher, R. A., Schwarz, C., Schwiening, J., Semenov, A. Yu., Semenova, I. A., Seth, K. K., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Sparks, N., Staib, M. J., Stevens, J. R., Strakovsky, I. I., Subedi, A., Tarasov, V., Taylor, S., Teymurazyan, A., Tolstukhin, I., Tomaradze, A., Toro, A., Tsaris, A., Vasileiadis, G., Vega, I., Walford, N. K., Werthmüller, D., Whitlatch, T., Williams, M., Wolin, E., Xiao, T., Zarling, J., Zhang, Z., Zihlmann, B., Mathieu, V., and Nys, J. Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.95.042201.
Al Ghoul, H., Anassontzis, E. G., Austregesilo, A., Barbosa, F., Barnes, A., Beattie, T. D., Bennett, D. W., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Brooks, W. K., Cannon, B. E., Chernyshov, O., Chudakov, E., Crede, V., Dalton, M. M., Deur, A., Dobbs, S., Dolgolenko, A., Dugger, M., Dzhygadlo, R., Egiyan, H., Eugenio, P., Fanelli, C., Foda, A. M., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gerasimov, A., Gevorgyan, N., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hardin, J., Henderson, A., Huber, G. M., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kamel, M., Klein, F. J., Kliemt, R., Kourkoumeli, C., Kuleshov, S., Kuznetsov, I., Lara, M., Larin, I., Lawrence, D., Levine, W. I., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Mattione, P. T., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Mendez, R., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Moriya, K., Nerling, F., Nigmatkulov, G., Ochoa, N., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pedroni, R., Pennington, M. R., Pentchev, L., Peters, K. J., Pooser, E., Pratt, B., Qiang, Y., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Salgado, C., Schumacher, R. A., Schwarz, C., Schwiening, J., Semenov, A. Yu., Semenova, I. A., Seth, K. K., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Sparks, N., Staib, M. J., Stevens, J. R., Strakovsky, I. I., Subedi, A., Tarasov, V., Taylor, S., Teymurazyan, A., Tolstukhin, I., Tomaradze, A., Toro, A., Tsaris, A., Vasileiadis, G., Vega, I., Walford, N. K., Werthmüller, D., Whitlatch, T., Williams, M., Wolin, E., Xiao, T., Zarling, J., Zhang, Z., Zihlmann, B., Mathieu, V., & Nys, J. Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV. United States. doi:10.1103/PhysRevC.95.042201.
Al Ghoul, H., Anassontzis, E. G., Austregesilo, A., Barbosa, F., Barnes, A., Beattie, T. D., Bennett, D. W., Berdnikov, V. V., Black, T., Boeglin, W., Briscoe, W. J., Brooks, W. K., Cannon, B. E., Chernyshov, O., Chudakov, E., Crede, V., Dalton, M. M., Deur, A., Dobbs, S., Dolgolenko, A., Dugger, M., Dzhygadlo, R., Egiyan, H., Eugenio, P., Fanelli, C., Foda, A. M., Frye, J., Furletov, S., Gan, L., Gasparian, A., Gerasimov, A., Gevorgyan, N., Goetzen, K., Goryachev, V. S., Guo, L., Hakobyan, H., Hardin, J., Henderson, A., Huber, G. M., Ireland, D. G., Ito, M. M., Jarvis, N. S., Jones, R. T., Kakoyan, V., Kamel, M., Klein, F. J., Kliemt, R., Kourkoumeli, C., Kuleshov, S., Kuznetsov, I., Lara, M., Larin, I., Lawrence, D., Levine, W. I., Livingston, K., Lolos, G. J., Lyubovitskij, V., Mack, D., Mattione, P. T., Matveev, V., McCaughan, M., McCracken, M., McGinley, W., McIntyre, J., Mendez, R., Meyer, C. A., Miskimen, R., Mitchell, R. E., Mokaya, F., Moriya, K., Nerling, F., Nigmatkulov, G., Ochoa, N., Ostrovidov, A. I., Papandreou, Z., Patsyuk, M., Pedroni, R., Pennington, M. R., Pentchev, L., Peters, K. J., Pooser, E., Pratt, B., Qiang, Y., Reinhold, J., Ritchie, B. G., Robison, L., Romanov, D., Salgado, C., Schumacher, R. A., Schwarz, C., Schwiening, J., Semenov, A. Yu., Semenova, I. A., Seth, K. K., Shepherd, M. R., Smith, E. S., Sober, D. I., Somov, A., Somov, S., Soto, O., Sparks, N., Staib, M. J., Stevens, J. R., Strakovsky, I. I., Subedi, A., Tarasov, V., Taylor, S., Teymurazyan, A., Tolstukhin, I., Tomaradze, A., Toro, A., Tsaris, A., Vasileiadis, G., Vega, I., Walford, N. K., Werthmüller, D., Whitlatch, T., Williams, M., Wolin, E., Xiao, T., Zarling, J., Zhang, Z., Zihlmann, B., Mathieu, V., and Nys, J. 2017. "Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV". United States. doi:10.1103/PhysRevC.95.042201.
@article{osti_1357419,
title = {Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV},
author = {Al Ghoul, H. and Anassontzis, E. G. and Austregesilo, A. and Barbosa, F. and Barnes, A. and Beattie, T. D. and Bennett, D. W. and Berdnikov, V. V. and Black, T. and Boeglin, W. and Briscoe, W. J. and Brooks, W. K. and Cannon, B. E. and Chernyshov, O. and Chudakov, E. and Crede, V. and Dalton, M. M. and Deur, A. and Dobbs, S. and Dolgolenko, A. and Dugger, M. and Dzhygadlo, R. and Egiyan, H. and Eugenio, P. and Fanelli, C. and Foda, A. M. and Frye, J. and Furletov, S. and Gan, L. and Gasparian, A. and Gerasimov, A. and Gevorgyan, N. and Goetzen, K. and Goryachev, V. S. and Guo, L. and Hakobyan, H. and Hardin, J. and Henderson, A. and Huber, G. M. and Ireland, D. G. and Ito, M. M. and Jarvis, N. S. and Jones, R. T. and Kakoyan, V. and Kamel, M. and Klein, F. J. and Kliemt, R. and Kourkoumeli, C. and Kuleshov, S. and Kuznetsov, I. and Lara, M. and Larin, I. and Lawrence, D. and Levine, W. I. and Livingston, K. and Lolos, G. J. and Lyubovitskij, V. and Mack, D. and Mattione, P. T. and Matveev, V. and McCaughan, M. and McCracken, M. and McGinley, W. and McIntyre, J. and Mendez, R. and Meyer, C. A. and Miskimen, R. and Mitchell, R. E. and Mokaya, F. and Moriya, K. and Nerling, F. and Nigmatkulov, G. and Ochoa, N. and Ostrovidov, A. I. and Papandreou, Z. and Patsyuk, M. and Pedroni, R. and Pennington, M. R. and Pentchev, L. and Peters, K. J. and Pooser, E. and Pratt, B. and Qiang, Y. and Reinhold, J. and Ritchie, B. G. and Robison, L. and Romanov, D. and Salgado, C. and Schumacher, R. A. and Schwarz, C. and Schwiening, J. and Semenov, A. Yu. and Semenova, I. A. and Seth, K. K. and Shepherd, M. R. and Smith, E. S. and Sober, D. I. and Somov, A. and Somov, S. and Soto, O. and Sparks, N. and Staib, M. J. and Stevens, J. R. and Strakovsky, I. I. and Subedi, A. and Tarasov, V. and Taylor, S. and Teymurazyan, A. and Tolstukhin, I. and Tomaradze, A. and Toro, A. and Tsaris, A. and Vasileiadis, G. and Vega, I. and Walford, N. K. and Werthmüller, D. and Whitlatch, T. and Williams, M. and Wolin, E. and Xiao, T. and Zarling, J. and Zhang, Z. and Zihlmann, B. and Mathieu, V. and Nys, J.},
abstractNote = {In this paper, we report measurements of the photon beam asymmetry $\Sigma$ for the reactions $\vec{\gamma}p\to p\pi^0$ and $\vec{\gamma}p\to p\eta $ from the GLUEX experiment using a 9 GeV linearly polarized, tagged photon beam incident on a liquid hydrogen target in Jefferson Lab's Hall D. The asymmetries, measured as a function of the proton momentum transfer, possess greater precision than previous $\pi^0$ measurements and are the first $\eta$ measurements in this energy regime. Lastly, the results are compared with theoretical predictions based on $t$-channel, quasi-particle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.},
doi = {10.1103/PhysRevC.95.042201},
journal = {Physical Review C},
number = 4,
volume = 95,
place = {United States},
year = 2017,
month = 4
}

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