TY - JOUR
T1 - Search for Phenomena of Partial Restoration of Chiral Symmetry in a High Momentum-Transfer Region
AU - Shimizu, Hajime
AU - Matsumura, Toru
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2003
Y1 - 2003
N2 - An experimental research trying to find precursory phenomena of the chiral transition in nuclei is going on by utilizing a 2.4 GeV Laser-Electron Photon beam at SPring-8. The photoproduction measurement of 2π0 has been conducted for this purpose at a high momentum- transfer region, where the interaction of an incident photon with a nucleon in the nuclear target is expected to take place inside the nucleus effectively. A preliminary result of the 2π0 photoproduction measurement is reported and a softening of the σ meson in nuclear medium is discussed as a candidate for the precursors. A plan for a η′ measurement is also discussed in connection with the axial U(1) problem, which might be affected by partial restoration of chiral symmetry in nuclei.
AB - An experimental research trying to find precursory phenomena of the chiral transition in nuclei is going on by utilizing a 2.4 GeV Laser-Electron Photon beam at SPring-8. The photoproduction measurement of 2π0 has been conducted for this purpose at a high momentum- transfer region, where the interaction of an incident photon with a nucleon in the nuclear target is expected to take place inside the nucleus effectively. A preliminary result of the 2π0 photoproduction measurement is reported and a softening of the σ meson in nuclear medium is discussed as a candidate for the precursors. A plan for a η′ measurement is also discussed in connection with the axial U(1) problem, which might be affected by partial restoration of chiral symmetry in nuclei.
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U2 - 10.1143/PTPS.149.112
DO - 10.1143/PTPS.149.112
M3 - Article
AN - SCOPUS:0041665142
SN - 0375-9687
VL - 149
SP - 112
EP - 120
JO - Progress of Theoretical Physics Supplement
JF - Progress of Theoretical Physics Supplement
ER -