l - th / 0 30 40 68 v 1 2 1 A pr 2 00 3 η - Nucleus interactions and in - medium properties of N ∗ ( 1535 ) in chiral models
نویسندگان
چکیده
The properties of η-nucleus interaction and their experimental consequences are investigated with η-nucleus optical potentials obtained by postulating the N * (1535) dominance for η-N system. The N * (1535) properties in nuclear medium are evaluated by two kinds of chiral effective models based on distinct pictures of N * (1535). We find that these two models provide qualitatively different optical potentials of the η meson, reflecting the in-medium properties of N * (1535) in these models. In order to compare these models in physical ob-servables, we calculate spectra of (d, 3 He) reactions for the η mesic nucleus formation with various kinds of target nuclei. We show that the (d, 3 He) spectra obtained in these models are significantly different and are expected to be distinguishable in experiments.
منابع مشابه
ar X iv : n uc l - th / 0 30 40 68 v 2 1 7 Ju n 20 03 η - Nucleus interactions and in - medium properties of N ∗ ( 1535 ) in chiral models
The properties of η-nucleus interaction and their experimental consequences are investigated with η-nucleus optical potentials obtained by postulating the N * (1535) dominance for η-N system. The N * (1535) properties in the nuclear medium are evaluated by two kinds of chiral effective models based on distinct pictures of N * (1535). We find that these two models provide qualitatively different...
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