The predictions of the relativistic O(4,2) theory have been calculated for the decays of all the higher spin baryon resonances, giving results in good agreement with the experimental data. The SU(3) has been included in the rest frame implying a definite symmetry breaking for the vertex functions.

A method is given for calculating vertex functions involving three currents obeying chiral SU(2)⊗ SU(2) commutation relations, without using soft-pion approximations. The procedure assumes one-particle dominance of intermediate states. The Weinberg sum rule emerges as a consequence of the vanishing of $q$-number Schwinger terms. The charge radius of the pion is obtained and is in agreement with existing data.

Some structure in the differential charge-transfer cross section of ${\mathrm{H}}^{+}$ +Kr was found. From basic similarities with comparable differential cross sections for elastic scattering, molecular curve crossings are suggested as the cause.

Experiments are described that reveal the nature of the surface relaxation mechanisms between ${\mathrm{He}}^3$ atoms and their containing walls, and effective means for their suppression. The resultant very long ${\mathrm{He}}^3$ relaxation times (>2×${10}^5$ sec at 300°K, and rising rapidly with temperature) measured in highly spin-polarized samples prepared by optical pumping offer new possibilities for high-density polarized ${\mathrm{He}}^3$ nuclear targets, and for experiments requiring near-perfect gyroscopes.

The dependence of positron lifetimes on sample temperature has been studied in several metals over a range from room temperature to the melting point or to 400°C. Marked effects, amounting to as much as a 30% increase in lifetime, are noted in most of the low-melting-point metals. Lattice vacancies are considered to be the likely cause of these effects.

We present evidence for $K^{*}\mathrm{}\left(1250\right)\mathrm{}$ resonance production in $K^{+}p$ interactions at 9 BeV/c. We observe that the large $K\pi \pi$ mass enhancement in the region 1.1 to 1.5 BeV probably consists of three resonances at the observed masses 1.25, 1.36, and 1.42 BeV above a broad background due primarily to diffraction dissociation.

It is suggested that the peculiar variation in structure observed in the $K\pi \pi$ mass enhancement in the region 1.1 to 1.4 BeV as a function of incident momentum could be primarily due to interference between two resonances with the same $J^P$ values.

We have measured the decay parameters of ${\Sigma }^{-}\to n+{\pi }^{-}$. We find ${\alpha }_{-}=-0.104\mathrm{}\pm 0.04$. Defining $\varphi$ by ${\beta }_{-}={(1-{{\alpha }_{-}}^2)}^{-\frac{1}{2}}sin\varphi$, ${\gamma }_{-}={(1-{{\alpha }_{-}}^2)}^{-\frac{1}{2}}cos\varphi$, we find $\varphi =-22\mathrm{}°\pm 30°$, i.e., the decay occurs mainly through the $S$-wave channel.

The decay rate for the mode $K^{+}\to e^{+}+\nu$ has been measured. There are ten events, which include an estimated 0.34 background event only, and the branching ratio relative to $K^{+}\to {\mu }^{+}+\nu$ is found to be $R={1.9}_{-0.5\mathrm{}}^{+0.8\mathrm{}}\times {10}^{-5\mathrm{}}$. This is in good agreement with the prediction of the $V-A$ theory, which is $R=2.10\mathrm{}\times {10}^{-5\mathrm{}}$, including radiative corrections.