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

GlueX Collaboration

Research output: Contribution to journalArticle

26 Citations (Scopus)

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 (US)
Article number042201
JournalPhysical Review C
Volume95
Issue number4
DOIs
StatePublished - Apr 24 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

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

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

Research output: Contribution to journalArticle

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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 - GlueX Collaboration

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, Michael

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 - Ritchie, Barry

PY - 2017/4/24

Y1 - 2017/4/24

N2 - 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.

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

DO - 10.1103/PhysRevC.95.042201

M3 - Article

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JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

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