No abstract available

[en] The numerical calculations of binding energies and elastic constants for Cu, Ag and Au are carried out using a one-parameter model potential. A comparison of the results obtained in these calculations with experimental data and some previous theoretical results showed that the one-parameter model potential simulates the real electron-ion interaction of Cu, Ag and Au, and gives a much improved degree of agreement between theory and experiment for binding energies and elastic constants. (author)

No abstract available

[en] The implications of the Glashow-Iliopoulos-Maiani model in the deep inelastic region are investigated using the light cone algebra. Whether one solve above or below the threshold for production of charmed particles, sin² theta/sub w/ approximately 0.4 is found. The implied charge-symmetry violation is examined. The strange and charmed quark content of the nucleon is estimated

[en] K/sub l₃/ form factors are studied in an analytic hard-meson approach, using the (8,8) model of chiral SU(3) x SU(3) symmetry breaking. The divergence form factor is required to show resonance behavior near the kappa meson mass. The ensuing resonance conditions are used to express lambda₀, the slope of the divergence form factor and GAMMA/sub JC/, the kappa width, in terms of the kappa mass. A considerable suppression of lambda₀ below its Callan-Treiman value can be obtained. Comparison is made with a previous analysis of K/sub l₃/ decay using the (3,3*) + (3*,3) model of symmetry breaking. It is suggested that one cannot rule out the (8,8) model in favor of the (3,3*) + (3*,3) at present

[en] Vector-pseudoscalar-pseudoscalar and vector-vector pseudoscallar coupling constants are calculated in broken SU(4) using current algebra and PCAC. As applications of results estimates of the decay widths GAMMA(phi/sub c/ → x⁰γ), GAMMA(phi/sub c/ → eta/sub c/γ) and GAMMA(eta/sub c/ → 2γ) are presented

[en] A model for calculating ratios of cross sections is constructed. The model is applied to SU(3) calculating /sup sigma//sup K/rho/sigma/sub π rho/, and then to SU(4) in order to estimate the psi rho cross section. Results are obtained in both ''pure'' and broken SU(4). The energy dependence of sigma/sub psi rho/ and the slope of the psi rho differential cross section are qualitatively discussed. Kinematic effects arising from mass splittings and t/sub min/ effects are crucial

No abstract available

[en] The ratios of πp, Kp and psi p total cross sections are calculated utilizing coupled homogeneous linear integral equations supplemented with SU(4) symmetry for the couplings. Kinematic effects arising from mass splittings and t/sub min/ effects are crucial. One obtains sigma/sub πp//sigma/sub Kp/ approximately 1.7 and sigma/sub psi p//sigma/sub πp/ approximately ¹/₅₀

[en] It is pointed out that the prediction of a large charge-symmetry violation by the Achiman gauge-symmetry model also leads to a violation of the positivity condition on the structure function F₂/sup nu//subN. A search for the origins of this inconsistency is made