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Role of U(1) breaking term in dynamical chiral symmetry breaking of chiral effective theories
Shinnosuke Kono, Daisuke Jido, Yoshiki Kuroda +1
The spontaneous breaking of chiral symmetry is examined by chiral effective theories, such as the linear sigma model and the Nambu Jona-Lasinio (NJL) model. Indicating that suffici…
Inverse Mass Hierarchy of Light Scalar Mesons Driven by Anomaly-Induced Flavor Breaking
Yoshiki Kuroda, Masayasu Harada, Shinya Matsuzaki +1
We propose a novel mechanism to reproduce the observed mass hierarchy for the scalar mesons lighter than 1 GeV (called the inverse hierarchy) regarding them as mesons made of a qua…
Origin of energy shift in kaonic atom and kaon-nucleus interaction
Yutaro Iizawa, Daisuke Jido, Natsumi Ikeno +2
The -nucleus optical potential is revisited to investigate its global feature phenomenologically. It is a puzzle that the energy shift is found to be repulsive in all of the o…