3He(γ, pπ±) reactions are simultaneously measured for tagged photon energies of 380 ≤ Eγ ≤ 700 MeV. The yield ratio for the two channels, under the same kinematical and dynamical conditions, is found to be 0.90±0.07. Implications of this ratio in terms of the delta component in the ground state of 3He are examined. An alternate interpretation of this ratio as due to an admixture of isospin T = 1 2 and 3 2 transition amplitudes in a pure isovector interaction is also presented.
ASJC Scopus subject areas
- Nuclear and High Energy Physics