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. DolgolenkoM. 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

Research School of High-Energy Physics

Research output: Contribution to journal › Article

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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 language	English
Article number	042201
Journal	Physical Review C
Volume	95
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.95.042201
Publication status	Published - 24 Apr 2017

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.95.042201

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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., ... 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 journal › Article

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

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.",

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

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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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