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arXiv · 1011.0073

Coherent Photoproduction of pi^+ from 3^He

Rakhsha Nasseripour·Barry Berman·the CLAS Collaboration
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Abstract

We have measured the differential cross section for the $γ$$^3$He$\rightarrow π^+ t$ reaction. This reaction was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons produced with the Hall-B bremsstrahlung tagging system in the energy range from 0.50 to 1.55 GeV were incident on a cryogenic liquid $^3$He target. The differential cross sections for the $γ$$^3$He$\rightarrow 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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Rakhsha Nasseripour, Barry Berman, the CLAS Collaboration. 2010-10-30. Coherent Photoproduction of pi^+ from 3^He. https://doi.org/10.1103/physrevc.83.034001

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