140 citations · 495 across the 56 of their papers we have counts for
9 papers · 2 filters
Production of 3pi0 and eta 2pi0 from pi-p Collision in GAMS Experiment
Masaaki Kobayashi, Tsuneaki Tsuru, Kunio Takamatsu +4
The data on the pi- p --> M0 n, with M0 = pi0 pi0 pi0 or pi0 pi0 eta obtained in the GAMS experiment may be useful to study the sigma(400--700) and a_1^chi (1000), which can be tak…
Covariant Level-Classification Scheme and Chiral Symmetry
Shin Ishida, Muneyuki Ishida, Tomohito Maeda
Starting from the bi-local Klein-Gordon Equation with spin-independent squared-mass operator, we give a covariant quark representation of general composite meson systems with defin…
Light sigma-Meson Production in Excited Upsilon Decay Processes II: Theoretical Investigation
Muneyuki Ishida, Shin Ishida, Toshihiko Komada
The results of analyses obtained in Part I are examined from the viewpoint of chiral symmetry. The mass spectra of pi pi system are widely believed to be suppressed generally near…
Light sigma-Meson Production in Excited Upsilon Decay Processes I: Analyses
Toshihiko Komada, Shin Ishida, Muneyuki Ishida
We analyze the pi pi production amplitudes in the excited Upsilon decay processes, Upsilon(2S)-->Upsilon(1S)pi+pi-, Upsilon(3S)-->Upsilon(1S)pi+pi- and Upsilon(3S)-->Upsilon(2S)pi+…
S-matrix Bases and Relation between pi pi Scattering and Production Amplitudes
Shin Ishida, Muneyuki Ishida
It is stated that the requirement of unitarity and of analyticity should be made on the S-matrix elements with right bases, and the ``universality argument" made with the bases, wh…
Effect of light sigma-meson Production in ppbar --> 3 pi0 at rest
Muneyuki Ishida, Toshihiko Komada, Shin Ishida +3
The pi0 pi0 mass spectra and angular distributions around KKbar -threshold and at 1.5 GeV in ppbar (at rest) --> 3 pi0 in the Crystal Barrel experiment are reanalyzed by applying t…
Covariant Quark-Representation of Composite Meson Systems and Chiral Symmetry
Shin Ishida, Muneyuki Ishida, Tomohito Maeda
Assuming the spin-independence for confining force, we give a covariant quark representation of general composite meson systems with definite Lorentz transformation properties. For…
Semi-Leptonic B Meson Decays to Excited D Mesons in the Covariant Oscillator Quark Model
Masuho Oda, Kazunori Nishimura, Muneyuki Ishida +1
The spectra and branching ratios of the weak semi-leptonic B meson decays to the first excited D mesons are predicted, taking into account the confined effects of quarks using the…
Covariant Description of Composite Meson Systems and Chiral Symmetry
Shin Ishida, Muneyuki Ishida, Tomohito Maeda
Assuming the spin-independence for confining force, we give a covariant quark representation of general composite meson systems with definite Lorentz transformation properties. For…