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 |
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Article number | 042201 |
Journal | Physical Review C |
Volume | 95 |
Issue number | 4 |
DOIs | |
Publication status | Published - 24 Apr 2017 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics