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32 papers · 1 filter
Topological properties of Berry's phase
Kazuo Fujikawa
By using a second quantized formulation of level crossing, which does not assume adiabatic approximation, a convenient formula for geometric terms including off-diagonal terms is d…
Role of Large Gluonic Excitation Energy for Narrow Width of Penta-Quark Baryons in QCD String Theory
Hideo Suganuma, Fumiko Okiharu, Toru T. Takahashi +1
We study the narrow decay width of low-lying penta-quark baryons in the QCD string theoryin terms of gluonic excitations. In the QCD string theory, the penta-quark baryon decays vi…
Narrow Width of Penta-Quark Baryons in QCD String Theory
Hideo Suganuma, Hiroko Ichie, Fumiko Okiharu +1
Using the QCD string theory, we investigate the physical reason of the narrow width of penta-quark baryons in terms of the large gluonic-excitation energy. In the QCD string theory…
Q-Deformed Bi-Local Fields
Shigefumi Naka, Haruki Toyoda, Aiko Kimishima
We study the q-deformation of the bi-local system, two particle system, bounded by a relativistic harmonic oscillator type of potential from both points of view of mass spectra and…
Detailed Analysis of the Tetraquark Potential and Flip-Flop in SU(3) Lattice QCD
Fumiko Okiharu, Hideo Suganuma, Toru T. Takahashi
We perform the detailed study of the tetraquark (4Q) potential for various QQ- systems in SU(3) lattice QCD with and at th…
Effect of Dynamical Coulomb Correlations on the Fermi Surface of Na_0.3CoO_2
H. Ishida, M. D. Johannes, A. Liebsch
The t2g quasi-particle spectra of Na_0.3CoO_2 are calculated within the dynamical mean field theory. It is shown that as a result of dynamical Coulomb correlations charge is transf…