Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

H. Al Ghoul, E. G. Anassontzis, A. Austregesilo, F. Barbosa, A. Barnes, T. D. Beattie, D. W. Bennett, V. V. Berdnikov, T. Black, W. Boeglin, W. J. Briscoe, W. K. Brooks, B. E. Cannon, O. Chernyshov, E. Chudakov, V. Crede, M. M. Dalton, A. Deur, S. Dobbs, A. Dolgolenko & 31 others M. Dugger, R. Dzhygadlo, H. Egiyan, P. Eugenio, C. Fanelli, A. M. Foda, J. Frye, S. Furletov, L. Gan, A. Gasparian, A. Gerasimov, N. Gevorgyan, K. Goetzen, V. S. Goryachev, L. Guo, H. Hakobyan, J. Hardin, A. Henderson, G. M. Huber, D. G. Ireland, M. M. Ito, N. S. Jarvis, R. T. Jones, V. Kakoyan, M. Kamel, F. J. Klein, R. Kliemt, C. Kourkoumeli, S. Kuleshov, V. Lyubovitskij, GlueX Collaboration

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Abstract

We report measurements of the photon beam asymmetry Σ for the reactions γ - p→pπ0 and γ - p→pη 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 π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

Original languageEnglish
Article number042201
JournalPhysical Review C
Volume95
Issue number4
DOIs
Publication statusPublished - 24 Apr 2017

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photoproduction
photon beams
asymmetry
protons
liquid hydrogen
momentum transfer
mesons
predictions
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Al Ghoul, H., Anassontzis, E. G., Austregesilo, A., Barbosa, F., Barnes, A., Beattie, T. D., ... GlueX Collaboration (2017). Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV. Physical Review C, 95(4), [042201]. https://doi.org/10.1103/PhysRevC.95.042201

Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV. / 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.; Lyubovitskij, V.; GlueX Collaboration.

In: Physical Review C, Vol. 95, No. 4, 042201, 24.04.2017.

Research output: Contribution to journalArticle

Al Ghoul, H, Anassontzis, EG, Austregesilo, A, Barbosa, F, Barnes, A, Beattie, TD, Bennett, DW, Berdnikov, VV, Black, T, Boeglin, W, Briscoe, WJ, Brooks, WK, Cannon, BE, Chernyshov, O, Chudakov, E, Crede, V, Dalton, MM, Deur, A, Dobbs, S, Dolgolenko, A, Dugger, M, Dzhygadlo, R, Egiyan, H, Eugenio, P, Fanelli, C, Foda, AM, Frye, J, Furletov, S, Gan, L, Gasparian, A, Gerasimov, A, Gevorgyan, N, Goetzen, K, Goryachev, VS, Guo, L, Hakobyan, H, Hardin, J, Henderson, A, Huber, GM, Ireland, DG, Ito, MM, Jarvis, NS, Jones, RT, Kakoyan, V, Kamel, M, Klein, FJ, Kliemt, R, Kourkoumeli, C, Kuleshov, S, Lyubovitskij, V & GlueX Collaboration 2017, 'Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV', Physical Review C, vol. 95, no. 4, 042201. https://doi.org/10.1103/PhysRevC.95.042201
Al Ghoul H, Anassontzis EG, Austregesilo A, Barbosa F, Barnes A, Beattie TD et al. Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV. Physical Review C. 2017 Apr 24;95(4). 042201. https://doi.org/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. ; Lyubovitskij, V. ; GlueX Collaboration. / Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV. In: Physical Review C. 2017 ; Vol. 95, No. 4.
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abstract = "We report measurements of the photon beam asymmetry Σ for the reactions γ - p→pπ0 and γ - p→pη 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 π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.",
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T1 - Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ=9 GeV

AU - Al Ghoul, H.

AU - Anassontzis, E. G.

AU - Austregesilo, A.

AU - Barbosa, F.

AU - Barnes, A.

AU - Beattie, T. D.

AU - Bennett, D. W.

AU - Berdnikov, V. V.

AU - Black, T.

AU - Boeglin, W.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Cannon, B. E.

AU - Chernyshov, O.

AU - Chudakov, E.

AU - Crede, V.

AU - Dalton, M. M.

AU - Deur, A.

AU - Dobbs, S.

AU - Dolgolenko, A.

AU - Dugger, M.

AU - Dzhygadlo, R.

AU - Egiyan, H.

AU - Eugenio, P.

AU - Fanelli, C.

AU - Foda, A. M.

AU - Frye, J.

AU - Furletov, S.

AU - Gan, L.

AU - Gasparian, A.

AU - Gerasimov, A.

AU - Gevorgyan, N.

AU - Goetzen, K.

AU - Goryachev, V. S.

AU - Guo, L.

AU - Hakobyan, H.

AU - Hardin, J.

AU - Henderson, A.

AU - Huber, G. M.

AU - Ireland, D. G.

AU - Ito, M. M.

AU - Jarvis, N. S.

AU - Jones, R. T.

AU - Kakoyan, V.

AU - Kamel, M.

AU - Klein, F. J.

AU - Kliemt, R.

AU - Kourkoumeli, C.

AU - Kuleshov, S.

AU - Lyubovitskij, V.

AU - GlueX Collaboration

PY - 2017/4/24

Y1 - 2017/4/24

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AB - We report measurements of the photon beam asymmetry Σ for the reactions γ - p→pπ0 and γ - p→pη 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 π0 measurements and are the first η measurements in this energy regime. The results are compared with theoretical predictions based on t-channel, quasiparticle exchange and constrain the axial-vector component of the neutral meson production mechanism in these models.

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U2 - 10.1103/PhysRevC.95.042201

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