Measurement of the beam asymmetry Σ for π0 and η photoproduction on the proton at Eγ = 9GeV Н. Al Ghoul, E. G. Anassontzis, A. Austregesilo [et al.]
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ArticleSubject(s): фотонные пучки | нейтральные мезоны | фоторождение | GlueXGenre/Form: статьи в журналах Online resources: Click here to access online
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Physical Review C Vol. 95, № 4. P. 042201-1-042201-6Abstract: We report measurements of the photon beam asymmetry 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.
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We report measurements of the photon beam asymmetry 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.
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