2003 Fiscal Year Final Research Report Summary
In-medium Meson properties and Nuclear Exotres.
| Project/Area Number |
14540268
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Nara Women's University |
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Principal Investigator |
HIRENZAKI Satoru Nara Women's University, Physics, Associate Prof., 理学部, 助教授 (60283925)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Pionic Atom / η mesic nuclears / (d,^3He)reaction |
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| Research Abstract |
The properties of eta-nucleus interaction and their experimental consequences are investigated with eta-nucleus optical potentials obtained by postulating the N^*(1535) dominance for eta-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 eta meson, reflecting the in-medium properties of N^*(1535) in these models. In order to compare these models in physical observables, we calculate spectra of (d,3He) reactions for the eta mesic nucleus formation with various kinds of target nuclei. We show that the (d,3He) spectra obtained in these models are significantly different and are expected to be distinguishable in experiments.
We also explore the possibility to observe an enhanced 2pi correlation in the scalar iso-scalar (sigma) channel in nuclei by (d,t) and (d,^3He) reactions to obtain new information on the partial restoration of chiral symmetry in the nuclear medium. The sensitivity of the reaction spectra on the change of the chiral condensate in the nuclear medium is examined.
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Research Products
(15 results)
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[Publications] H.Geissel, H.Glig, A.Gillitzer, R.S.Hayano, S.Hirenzaki, K.Itahashi, M.Iwasaki, P.Kienle, M.Mu"nch, G.Mu"zenberg, W.Schott, K.Suzuki, D.Tomono, H.Weich, T.Yamazaki, T.Yoneyama: "Deeply bound is and 2p pionic states in 205Pb and determination of the s-wave part of the pion-nucleus Interaction"Physical Review Letters. 88. 122301 1-122301 4 (2002)
Description
「研究成果報告書概要(欧文)」より
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[Publications] H.Geissel, H.Gilg, A.Gillitzer, R.S.Hayano, S.Hirenzaki, K.Itahashi, M.Iwasaki, P.Kienle, M.Mu"nch, G.Mu"zenberg, W, Schott, K.Suzuki, D.Tomono, H.Welch, T.Yamazaki, T.Yoneyama: "Experimental Indication of a reduced chiral order parameter from the 1s π state In 205Pb"Phys.Lett.B. 549. 64-71 (2002)
Description
「研究成果報告書概要(欧文)」より
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[Publications] K.Suzuki, M.Fujita, H.Geissel, H.Gilg, A.Gillitzer, R.S.Hayano, S.Hirenzaki, K.Itahashi, M.Iwasaki, P.Kienle, M.Matos, G.M"unzenberg, T.Ohtsubo, M.Sato, M.Shindo, T.Suzuki, H.Weick, M.Winkler, T.Yamazaki, T.Yoneyama: "Precision spectroscopy of pionic 1s states of Snnuclei and evidence for partial restoration of chiral symmetry in the nuclear medium"Phys.Rev.Lett.. (accepted.). (2004)
Description
「研究成果報告書概要(欧文)」より
