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  1. No Access

    Article

    Impossibility of having the exactU 6 group based upon algebra of currents

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1966)

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    Article

    Algebra of currents in nonzero momentum states

    It has been shown that theSU 4 orSU 6 algebra of currents has no consistent solution for nonzero-momentum states in the approximation of dominance of low-lying intermediate states, in contrast to the case of zero...

    M. P. Khanna, S. Okubo, N. Mukunda in Il Nuovo Cimento A (1965-1970) (1966)

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    Article

    Algebra of currents based upon theSU W6 group

    Some consequences based upon the algebra of currents of theSU w6 group have been investigated by a method originally due to Lee. In this way, we can reproduce almost all of the...

    M. P. Khanna, S. Okubo in Il Nuovo Cimento A (1965-1970) (1966)

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    Article

    A high-energy theorem by algebra of currents

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1966)

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    Article

    Inconsistency of canonical commutation relations among current densities

    Ordinary commutation relations among current densities have been shown to lead to inconsistency without assuming the conservation law of currents. Also it is demonstrated that the ordinary PS-PV meson theory a...

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1966)

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    Article

    Derivation of the van Kampen's causality condition for complex potentials and related problems

    Following a method originally due toSaavedra, van Kampen's causality condition for scattering by complex potentials was derived. Together with this problem, both Wigner inequality and Levinson theorem are also di...

    H. H. Aly, S. Okubo in Zeitschrift für Physik (1967)

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    Article

    Electromagnetic mass differences of baryons based upon the Reggeized tadpole model

    A simple calculation, based upon a Reggeized tadpole model and upon Harari’s once-subtracted dispersion relation gives fair agreement of baryon, electromagnetic mass differences with experimental values.

    Yu-Chien Liu, S. Okubo in Il Nuovo Cimento A (1965-1970) (1967)

  8. No Access

    Article

    Yang-Mill intermediate bosons and CP violation

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1968)

  9. No Access

    Article

    Stress-concentration factors for multiple semielliptical notches in beams under pure bending

    Uniformly spaced semielliptical notches in rectangular beams under pure bending are examined photoelastically. Minimum stress-concentration factors, produced by multiple elliptical notching of beams, are obtai...

    A. Ching, S. Okubo, C. Tsao in Experimental Mechanics (1968)

  10. No Access

    Article

    Weak, strong and electromagnetic interactions of intermediate vector mesons

    A nonet of Yang-Mill intermediate vector mesons has been introduced with weak interaction having the maximumCP violation. A unitary-singlet part of this nonet is assumed to have a strong Yukawatype interaction wi...

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1968)

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    Article

    Spectral sum rules for three-point functions and their application to π0→2γ decay

    The Lehmann-Källén representation for three-point functions involving a soft pion has been derived and applied to various processes including π0→2γ decay. The integrally-charged-quark model is preferred but the m...

    R. Chanda, R. N. Mohapatra, S. Okubo in Il Nuovo Cimento A (1965-1970) (1968)

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    Chapter

    Intermediate Vector Mesons and CP-Violations

    The weak interactions have provided many surprises, the first of which was the violations of the parity (P) and the charge conjugation (C) invariance and, more recently, the CP-violation. The so-called V-A theory...

    S. Okubo in Symposia on Theoretical Physics and Mathematics 9 (1969)

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    Article

    A model of maximal CP violation

    A model of weak interaction is introduced which shows maximal CP violation. The model contains an octet (or nonet) of intermediate vector meson fields with a strong tri-linear self-coupling. First order terms ...

    S. Okubo in Acta Physica Academiae Scientiarum Hungaricae (1969)

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    Article

    Further studies on the sodium retaining activity of liver extract

    Fazekas and Fazekas (1966) showed that aldosterone in the liver was extracted as the supernatant of acetone-treated homogenate. In our study the sodium-retaining substance was always demonstrated in the precip...

    H. Maezawa, Y. Ito, H. Matsui, S. Okubo, K. Ono in Gastroenterologia Japonica (1970)

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    Article

    Influence of concentrated lateral loads on the elastic stability of cylinders in bending

    The character of the instability and the degradation of the moment-carrying capacity are found by Mylar model experiments for cylinders in bending when subjected to concentrated lateral loads. Lateral loads ca...

    S. Okubo, P. E. Wilson, J. S. Whittier in Experimental Mechanics (1970)

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    Article

    Variational method and chiral symmetry model

    Some general consequences of the variational method have been derived. In this way, we could justify the Reggeized tadpole model for electromagnetic-mass differences among hadrons. The result has been especial...

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1971)

  17. No Access

    Article

    A generalization of chiralSW 3 model

    Assuming the algebra of currents, PCAC for pions, and some other technical conditions, we prove that any Hamiltonian densityH(x), whoseSU 3-breaking component belongs to the (3, 3*)⊕(3*, 3) representation of theS...

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1972)

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    Article

    Spinor space approach to hadron mass formula

    S. Araki, S. Okubo in Lettere al Nuovo Cimento (1971-1985) (1972)

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    Chapter

    Dispersion Inequalities and Their Application to the Pion’s Electromagnetic Radius and the Kℓ3 Parameters

    The dispersion relation is an indispensable tool for analyzing various problems in high energy physics. In this paper, we shall consider applications of a new type of dispersion relation to various problems.

    S. Okubo in Fundamental Interactions in Physics and Astrophysics (1973)

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    Article

    An analysis of Chew-Low integral equation

    It has been analytically shown that the Chew-Low integral equation for the static pion-nucleon scattering problem does not have a solution for the case of no cut-off or for slowly decreasing cut-off functions....

    S. Okubo in Il Nuovo Cimento A (1965-1970) (1973)

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