38 citations · 47 across the 3 of their papers we have counts for
4 papers · 1 filter
Exotic Quark Structure of Lambda(1405) in QCD Sum Rule
T. Nakamura, J. Sugiyama, N. Ishii +2
A new analysis is performed in QCD sum rule for the lightest negative parity baryon Lambda (1405). Mixings of three-quark and five-quark Fock components are taken into account. Ter…
Mixings of 4-quark components in light non-singlet scalar mesons in QCD sum rules
J. Sugiyama, T. Nakamura, N. Ishii +2
Mixings of 4-quark components in the non-singlet scalar mesons are studied in the QCD sum rules. We propose a formulation to evaluate the cross correlators of q\bar q and qq\bar q…
Penta-quark baryon from the QCD Sum Rule
Jun Sugiyama, Takumi Doi, Makoto Oka
Exotic penta-quark baryon with strangeness +1, Θ^+, is studied in the QCD sum rule approach. We derive sum rules for the positive and negative parity baryon states with J=1/2 and I…
Vector Component of Confinement Force and P-Wave Spectrum of D mesons
Jun Sugiyama, Satoshi Mashita, Muneyuki Ishida +1
The mass spectrum and the pionic decay widths of the P-wave mesons are studied using the Dirac equation for the light quark. Our aim is to determine the Lorentz property of the…