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 (US) |
|---|---|
| Article number | 042201 |
| Journal | Physical Review C |
| Volume | 95 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 24 2017 |
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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 journal › Article
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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, 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.
UR - http://www.scopus.com/inward/record.url?scp=85018550688&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85018550688&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.95.042201
DO - 10.1103/PhysRevC.95.042201
M3 - Article
AN - SCOPUS:85018550688
VL - 95
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 4
M1 - 042201
ER -