Sigma-nucleus potential in A=28

We have studied the (pi(-),K+) reaction on a silicon target to investigate the sigma-nucleus potential. The inclusive spectrum was measured at a beam momentum of 1.2 GeV/c with an energy resolution of 3.3 MeV (FWHM) by employing the superconducting kaon spectrometer system. The spectrum was compared...

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Veröffentlicht in:	Physical review letters 2002-08, Vol.89 (7), p.072301-072301, Article 072301
Hauptverfasser:	Noumi, H, Saha, P K, Abe, D, Ajimura, S, Aoki, K, Bhang, H C, Endo, T, Fujii, Y, Fukuda, T, Guo, H C, Imai, K, Hashimoto, O, Hotchi, H, Kim, E H, Kim, J H, Kishimoto, T, Krutenkova, A, Maeda, K, Nagae, T, Nakamura, M, Outa, H, Sekimoto, M, Saito, T, Sakaguchi, A, Sato, Y, Sawafta, R, Shimizu, Y, Takahashi, T, Tang, L, Tamura, H, Tanida, K, Watanabe, T, Xia, H H, Zhou, S H, Zhu, L H, Zhu, X F
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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Zusammenfassung:	We have studied the (pi(-),K+) reaction on a silicon target to investigate the sigma-nucleus potential. The inclusive spectrum was measured at a beam momentum of 1.2 GeV/c with an energy resolution of 3.3 MeV (FWHM) by employing the superconducting kaon spectrometer system. The spectrum was compared with theoretical calculations within the framework of the distorted-wave impulse approximation, which demonstrates that a strongly repulsive sigma-nucleus potential with a nonzero size of the imaginary part reproduces the observed spectrum.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.89.072301