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7 papers · 2 filters
The ~U(12)-Classification Scheme, Static U(4)-Spin Symmetry for Light-Quarks and "Exotic" Hadrons
Shin Ishida
Several years ago we have proposed a manifestly covariant -classification scheme of hadrons, which maintains the successful framewo…
Chiral Mass Splitting for c \bar{s} and c \bar{n} Mesons in the \tilde{U}(12)-Classification Scheme of Hadrons
Kenji Yamada, Tomohito Maeda, Shin Ishida
We investigate the chiral mass splitting of parity-doubled J=0,1 states for c \bar{s} and c \bar{n} meson systems in the \tilde{U}(12)_{SF}-classification scheme of hadrons, using…
Ferromagnetism in quark matter and origin of the magnetic field in compact stars
T. Tatsumi, T. Maruyama, E. Nakano +1
Two magnetic aspects of quark matter, ferromagnetism and spin density wave, are discussed in the temperature-density plane. Some implications of ferromagnetism are suggested on rel…
Light wino dark matter in brane world cosmology
Takeshi Nihei, Nobuchika Okada, Osamu Seto
The thermal relic density of the wino-like neutralino dark matter in the brane world cosmology is studied. The expansion law at a high energy regime in the brane world cosmology is…
Four Quark cn - nbar cbar States in U(12)-Scheme and X(3872)/Y(3940)
Muneyuki Ishida, Shin Ishida, Tomohito Maeda
The properties of four quark cn - nbar cbar states are investigated as cn di-quark and nbar cbar di-antiquark system in U(12)-classification scheme of hadrons, recently proposed by…
Suppression of the neutralino relic density with supersymmetric CP violation
Takeshi Nihei
We study pair annihilations of the neutralino dark matter in the minimal supersymmetric standard model with CP violation. We consider the case that the higgsino mass and the trilin…