We have measured the differential cross section for the γ3He→ π+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 3He target. The differential cross sections for the γ3He→ π+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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Copyright © 2011 American Physical Society. This article first appeared in Physical Review C 83, no. 3 (March 3, 2011): 034001:1-11. doi:10.1103/PhysRevC.83.034001.

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