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6 papers · 2 filters
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…
Neutralino dark matter in brane world cosmology
Takeshi Nihei, Nobuchika Okada, Osamu Seto
The thermal relic density of the neutralino dark matter in the brane world cosmology is studied. Since the expansion law at a high energy regime in the brane world cosmology is mod…
The DsJ*(2317) and DsJ(2460) mesons in U~(12)-classification scheme of hadrons
Shin Ishida, Muneyuki Ishida, Tomohito Maeda +2
The narrow mesons, DsJ*(2317) and DsJ(2460), observed recently in the final states Ds+ pi0 and Ds*+ pi0 are pointed out to be naturally assigned as the ground-state scalar and axia…
Remark on Natural Models of Neutrinos
Kazuo Fujikawa
We comment on what the naturalness argument of 't Hooft implies for a minimal extension of the standard model which incorporates right-handed neutrinos with generic mass terms. If…
Relic density and elastic scattering cross sections of the neutralino in the MSSM with CP-violating phases
Takeshi Nihei, Masaki Sasagawa
We study the neutralino relic density and the neutralino-proton elastic scattering cross sections in the minimal supersymmetric standard model (MSSM) with CP-violating phases. We i…