The behavior of the cross section for diffraction production of a vector meson V with mass of about 2 GeV (for example, the F* (clambda) vector meson) in neutrino-nucleon collisions is discussed. It is shown that the cross section for the reaction depends substantially on the diffraction-peak slope parameter for the cross section for the process VN..-->..V+hadrons. Consideration is given to the possibility of explaining the distributions in hadron mass in the antineutrino beam in the experiments at FNAL as due to production of ordinary (uncharmed) vector hadron states in the spirit of the generalized vector dominance model. (AIP)

The possibilities of determining the structure of the weak hadronic neutral currents in the study of the nuclear transitions initiated by intermediate energy (≈ 100 MeV) neutrinos is analysed. It is shown that considerable information on the various components of these currents may be gained from experiments with an oxygen target. The suggested method of singling out the isoscalar Fermi component of the neutral current by investigation of the 6.05 MeV JπT = 0+0 level in 16O seems to be the most promising.

It is pointed out that in collapsing carbon-oxygen stars (M ⩽ 2M⊙) the neutrino heating initiates carbon and oxygen explosion in the stellar mantle leading to its ejection, i.e., to Supernova explosion. The main heating mechanism is the neutrino-electron scattering.

It was indicated that the charge asymmetry in the ..nu../sub ..mu../N (nu-bar/sub ..mu../N) scattering observed at high energies can be attributed to production of charmed particles if the angular momentum of the sea quarks increases with increasing energy.