Coherent Photoproduction of pi^+ from 3^He

Details Coherent Photoproduction of pi^+ from 3^He Coherent Photoproduction of pi^+ from 3^He

2010-10-30

arxiv.org/abs/1011.0073v1

Phys.Rev.C83:034001,2011

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 16 figures

Scientific paper

10.1103/PhysRevC.83.034001

We have measured the differential cross section for the $\gamma$$^3$He$\rightarrow \pi^+ t$ reaction. This reaction was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons produced with the Hall-B bremsstrahlung tagging system in the energy range from 0.50 to 1.55 GeV were incident on a cryogenic liquid $^3$He target. The differential cross sections for the $\gamma$$^3$He$\rightarrow \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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