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ΣNN quasibound states in He3 (K−, π∓) reactions at 600 MeV/c

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Title: ΣNN quasibound states in He3 (K−, π∓) reactions at 600 MeV/c
Authors: Harada, Toru Browse this author
Hirabayashi, Yoshiharu Browse this author
Issue Date: 7-May-2014
Publisher: American Physical Society
Journal Title: Physical Review C
Volume: 89
Issue: 5
Start Page: 054603
Publisher DOI: 10.1103/PhysRevC.89.054603
Abstract: We theoretically demonstrate the inclusive and semiexclusive spectra in the He3(K−, π∓) reactions at 600 MeV/c (4∘) within a distorted-wave impulse approximation, using a coupled (2N−Λ)+(2N−Σ) model with a spreading potential. We present the possible existence of the ΣNN quasibound state with Jπ= 1/2+, T≃ 1 near the Σ threshold, predicted by a 2N−Y folding-model potential derived from YN g-matrices. The result shows that a signal of the 3ΣHe quasibound state is clearly confirmed near the Σ threshold in the π− spectrum, whereas a peak of the 3Σn quasibound state is rather reduced in the π+ spectrum owing to the interference effects caused by the 3S1-1S0 admixture in the NN pair. The mechanism of Σ production for these spectra and charge symmetry breaking effects are also discussed.
Rights: ©2014 American Physical Society
Type: article
Appears in Collections:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 平林 義治


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