Measurement of the beam asymmetry Sigma for pi(0) and eta photoproduction on the proton at E-gamma=9 GeV

Authors

H. Al Ghoul
(...)
Justin R. Stevens, William & MaryFollow
et al.

Document Type

Article

Department/Program

Physics

Journal Title

Physical Review C

Pub Date

4-2017

Volume

95

Issue

4

Abstract

We report measurements of the photon beam asymmetry Sigma for the reactions (gamma) over right arrowp -> p pi(0) and gamma p -> p eta 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 pi(0) measurements and are the first. 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.

Recommended Citation

Al Ghoul, H.; (...); Stevens, Justin R.; and et al., Measurement of the beam asymmetry Sigma for pi(0) and eta photoproduction on the proton at E-gamma=9 GeV (2017). Physical Review C, 95(4).
https://doi.org/10.1103/PhysRevC.95.042201

DOI

https://doi.org/10.1103/PhysRevC.95.042201