Abstract
Hybrid/exotic meson spectroscopy searches at Jefferson Lab require the accurate theoretical description of the production mechanism in peripheral photoproduction. We develop a model for πΔ photoproduction at high energies (5≤Elab≤16 GeV) that incorporates both the absorbed pion and natural-parity cut contributions. We fit the available observables, providing a good description of the energy and angular dependencies of the experimental data. We also provide predictions for the photon beam asymmetry of charged pions at Elab=9 GeV which is expected to be measured by GlueX and CLAS12 experiments in the near future.
Highlights
There is mounting evidence for the existence of exotic hadrons that cannot be accommodated within the conventional quark model [1,2,3,4,5,6]
Photoproduction experiments dedicated to the exploration of the hybrid meson spectrum have just begun using the GlueX and CLAS12 detectors at Jefferson Lab (JLab) [12]
The success of these experiments relies on the accurate theoretical description of both the production mechanism and the decay of resonances in peripheral photoproduction [13]
Summary
Article history: Received 1 November 2017 Accepted 29 January 2018 Available online 2 February 2018 Editor: V. Hybrid/exotic meson spectroscopy searches at Jefferson Lab require the accurate theoretical description of the production mechanism in peripheral photoproduction. We develop a model for π photoproduction at high energies (5 ≤ Elab ≤ 16 GeV) that incorporates both the absorbed pion and natural-parity cut contributions. We fit the available observables, providing a good description of the energy and angular dependencies of the experimental data. We provide predictions for the photon beam asymmetry of charged pions at Elab = 9 GeV which is expected to be measured by GlueX and CLAS12 experiments in the near future
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