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

GlueX Collaboration

doi:10.1103/PhysRevC.95.042201

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

GlueX Collaboration

Florida State University
University of Athens
Thomas Jefferson National Accelerator Facility
University of Connecticut
University of Regina
Indiana University Bloomington
National Research Nuclear University MEPhI
University of North Carolina at Wilmington
Florida International University
George Washington University
Universidad Técnica Federico Santa María
Institute for Theoretical and Experimental Physics
Northwestern University
Arizona State University
GSI Helmholtzzentrum fur Schwerionenforschung
Massachusetts Institute of Technology
North Carolina Agricultural and Technical State University
Yerevan Physics Institute
University of Glasgow
Carnegie Mellon University
Catholic University of America
Tomsk State University
National Research Tomsk Polytechnic University
UMass Amherst
Norfolk State University
College of William and Mary
Wuhan University
Ghent University

Research output: Contribution to journal › Article › peer-review

63 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 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
Externally published	Yes

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10.1103/PhysRevC.95.042201

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@article{7406b644a54d47b8a68719330dae0efd,

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 = "\{GlueX Collaboration\} and \{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 I. Kuznetsov",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = apr,

day = "24",

doi = "10.1103/PhysRevC.95.042201",

language = "English",

volume = "95",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

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TY - JOUR

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, 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 - Kuznetsov, I.

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.

U2 - 10.1103/PhysRevC.95.042201

DO - 10.1103/PhysRevC.95.042201

M3 - Article

AN - SCOPUS:85018550688

SN - 2469-9985

VL - 95

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 042201

ER -

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

Abstract

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