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Probing the DeltaNN component of 3He

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  • And 6 more
Type
Published Article
Publication Date
Submission Date
Identifiers
DOI: 10.1103/PhysRevC.62.044001
arXiv ID: nucl-ex/9912001
Source
arXiv
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Unknown
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Abstract

The 3He(gamma,pi^+/- p) reactions were measured simultaneously over a tagged photon energy range of 800<E_gamma<1120 MeV, well above the Delta resonance region. An analysis was performed to kinematically isolate Delta knockout events from conventional Delta photoproduction events, and a statistically significant excess of pi+p events was identified, consistent with Delta++ knockout. Two methods were used to estimate the DeltaNN probability in the 3He ground state, corresponding to the observed knockout cross section. The first gave a lower probability limit of 1.5+/-0.6+/-0.5%; the second yielded an upper limit of about 2.6%.

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