Probing the ΔNN component of 3He

G. M. Huber, G. J. Lolos, E. J. Brash, S. Dumalski, F. Farzanpay, M. Iurescu, Z. Papandreou, A. Shinozaki, A. Weinerman, T. Emura, H. Hirosawa, K. Niwa, H. Yamashita, K. Maeda, T. Terasawa, Hirohito Yamazaki, S. Endo, K. Miyamoto, Y. Sumi, G. GarinoK. Maruyama, A. Leone, R. Perrino, T. Maki, A. Sasaki, Y. Wada

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The 3He(γ,π±p) reactions were measured simultaneously over a tagged photon energy range of 800 ≤Eγ≤1120 MeV, well above the Δ resonance region. An analysis was performed to kinematically isolate Δ knockout events from conventional Δ photoproduction events, and a statistically significant excess of π+ p events was identified, consistent with Δ++ knockout. Two methods were used to estimate the ΔNN 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%.

Original languageEnglish
Article number044001
Pages (from-to)440011-440018
Number of pages8
JournalPhysical Review C - Nuclear Physics
Volume62
Issue number4
Publication statusPublished - 2000 Oct

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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