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

34 Scopus citations

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

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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