abstract

A further development of the Einstein–Kaufman, nonsymmetric unified field theory is discussed. Static, spherically symmetric solutions of the field equations are considered. It is shown that there does not exist a solution corresponding to a magnetic monopole. In the purely electric case, one of Papapetrou’s solutions is recovered and a new “cosmological” solution is found in which the space-time metric is that of a flat Minkowski world but a diverging electric field is present. It is pointed out that the theory may be significant as an account of charged matter.

abstract

Gribov’s Reggeon graph technique is used to construct a simple Zachariasen-like mode with singularities in the \(j\)-plane. Decomposing the scattering amplitude into its one-Reggeon-irreducible and reducible parts yields a natural definition of the propagator, the vertex function, the formfactor and the renormalization constants of an intermediate Reggeon.

abstract

A regularization method in the Kadyshevsky momentum representation for the boson–boson and boson–photon interactions is applied.

abstract

The partial capture rates in muon capture by some light nuclei (\(^9\)Be, \(^{10}\)B, \(^{13}\)C, \(^{14}\)N, \(^{15}\)N and \(^{19}\)F) are calculated. The dependence of capture rates on nuclear structure is investigated. The possibility of deriving muon–nucleon coupling constants from data on light nuclei is discussed.

abstract

The model of intranuclear cascades taking into account the changes in the density of a target-nucleus as the cascade develops, is employed to light nuclei of carbon type. In the energy range \(T\leq 1\) GeV, the density does affect much the properties of cascade particles the number of low-energy particles being somewhat decreased) but it influences very strongly the yield of various isotopes already at the energies \(T = 300\)–400 MeV. The isotope yield also depends on the cluster structure of a target-nucleus.

abstract

The constraints for angular decay distributions of resonances photoproduced in the reactions \(\gamma B \to PB^*\), \(\gamma B \to VB\), and \(\gamma B \to VB^*\) in the “excited quark” model and the “interacting quarks” model, where quark structure is assumed only for baryons, are derived and compared with the corresponding predictions of the usual additive quark model of photoproduction including vector meson dominance and the additivity assumption. All the results of the “interacting quarks” model can be derived from the “excited quark” model and all the results of the “excited quark” model can be derived from the additive quark model.

abstract

Experimental facts related to the closure of a subshell for \(N = 108\) are summarized. It is suggested that this closure stabilizes the deformed shape of even W and Os nuclei.