2021
DOI: 10.1103/physrevc.103.l022201
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Measurement of beam asymmetry for πΔ++ photoproduction on the proton at Eγ=8.5

Abstract: We report a measurement of the ⇡ photoproduction beam asymmetry for the reaction~ p ! ⇡ ++ using data from the GlueX experiment in the photon beam energy range 8.2-8.8 GeV. The asymmetry ⌃ is measured as a function of four-momentum transfer t to the ++ and compared to phenomenological models. We find that ⌃ varies as a function of t: negative at smaller values and

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Cited by 6 publications
(3 citation statements)
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“…Thus, early measurements from GlueX have focused on a quantitative understanding of the meson photoproduction mechanism in this energy regime. Utilizing the linearly-polarized photon beam, beam asymmetries Σ have been measured for several single pseudoscalar mesons including the π 0 , π − , K + , η, and η over a broad range of momentum transfer, −t [207,205,206,208]. As demonstrated in Fig.…”
Section: Experimental Meson Spectroscopy Programmentioning
confidence: 99%
“…Thus, early measurements from GlueX have focused on a quantitative understanding of the meson photoproduction mechanism in this energy regime. Utilizing the linearly-polarized photon beam, beam asymmetries Σ have been measured for several single pseudoscalar mesons including the π 0 , π − , K + , η, and η over a broad range of momentum transfer, −t [207,205,206,208]. As demonstrated in Fig.…”
Section: Experimental Meson Spectroscopy Programmentioning
confidence: 99%
“…At high energies, natural (unnatural) exchanges contribute only to σ ⊥ (σ ). Figure from [552]. (right) η/η beam asymmetry ratio compared with the model of [544].…”
Section: Exchangementioning
confidence: 99%
“…Figure 40: (left) Beam asymmetry in π − ∆ ++ photoproduction. Comparison between GlueX data and the model in [546].Figure from[552]. (right) η/η beam asymmetry ratio compared with the model of[544].…”
mentioning
confidence: 99%