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Coherent photoproduction of pi(+) from He-3
Nasseripour, R. Berman, B. L. Briscoe, W. J. Egiyan, H. Griffioen, K. A. Zhao, B.
Nasseripour, R.
Berman, B. L.
Briscoe, W. J.
Egiyan, H.
Griffioen, K. A.
Zhao, B.
Abstract
We have measured the differential cross section for the gamma He-3 -> pi(+)t reaction. This reaction was studied using the Continuous Electron Beam Accelerator Facility (CEBAF) Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons produced with the Hall-B bremsstrahlung tagging system in the energy range from 0.50 to 1.55 GeV were incident on a cryogenic liquid He-3 target. The differential cross sections for the gamma He-3 -> pi(+)t reaction were measured as a function of photon-beam energy and pion-scattering angle. Theoretical predictions to date cannot explain the large cross sections except at backward angles, showing that additional components must be added to the model.
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2011-01-01
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Physics
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https://doi.org/10.1103/PhysRevC.83.034001