Showing papers in "Physics Letters B in 1969"

TL;DR: In this paper, it was shown that lepton nonconservation might lead to a decrease in the number of detectable solar neutrinos at the earth surface, because of νe←νμ oscillations, similar to K o ← K o oscillations.

TL;DR: The neutrino spectrum produced by protons on microwave photons was calculated in this article, and it was shown that a spectrum of extensive air shower primaries can have no cut-off at an energy E > 3 × 1019 eV, if the neutrinos-nucleon total cross-section rises up to the geometrical one of a nucleon.

TL;DR: In this paper, the dominant role of large longitudinal distances linearly increasing with the energy was investigated in the process of virtual photon and neutrino scattering on nucleons, and the conclusion that large longitudinal distance dominates the process was made.

TL;DR: The diagonal Pade approximants of the perturbation series for the eigenvalues of the anharmonic oscillator (i.e., a βκ^1 perturbations of p^2 + κ^2) converged to the Eigenvalues in this paper.

TL;DR: In this article, total cross-section data for negative pions, kaons, and antiprotons on protons and deuterons in the momentum range 20 GeV/c to 65 GeV /c was presented.

TL;DR: In this article, the short-lived isotopes of argon, krypton, silver, cadmium, tin, iodine, xenon, platinum, gold, mercury, polonium, radon and francium have been studied by the on-line isotope separator technique.

TL;DR: In this article, the half-life of alpha and spontaneous fission half-lives were estimated theoretically in the region of beta-stable nuclei with Z ≈ 114, N ≈ 184.

TL;DR: In this paper, a previous conjecture for constructing the N -point function in the generalized Veneziano model is proved, and the explicit solution given, which satisfies bootstrap consistency in treating all particles as bound states of others, and yields the decay correlations for particles with spin.

TL;DR: A collective nuclear Hamiltonian which is able to describe the case of a spherical harmonic vibrator nucleus as well as that of a permanently deformed rotator is diagonalized in the basis of the five-dimensional harmonic oscillator defined in the laboratory system as discussed by the authors.

TL;DR: In this paper, the authors investigated the SU(3) × SU (3) transformation properties of the hadron energy density H ( X ) under specific assumptions regarding the origin of the breaking of SU(2) ×SU(2).

TL;DR: In this paper, the final states of hadron collisions at high energy are grouped in classes which generalize to many-body processes, and the use of longitudinal phase space plots is proposed for the phenomenological analysis of experiments and their comparison with dynamical models.

TL;DR: In this paper, very cold neutrons from 60 μeV to 0.1 µeV were obtained through a vertical total-reflecting neutron guide tube and total cross sections measured by time-of-flight technique for gold and aluminium were found to obey the 1 ν law.

TL;DR: In this paper, it was shown that the slope parameter of the differential p-p scattering is monotonously increasing when the proton energy rises in the range 12-70 GeV.

TL;DR: In this paper, an explicit operatorial form which represents the twisted lines in the duality diagrams is presented. But this form is not suitable for the problem of the derivation of the symmetric three-resonance vertices.

TL;DR: In this paper, the signs of E2, M1 transition matrix elements, which are of interest in connection with the Coulomb excitation measurement of quadrupole moments, and B (E2) values, and the angular correlation measurement of E 2/M 1 mixing ratios, are given.

TL;DR: Veneziano-type amplitudes for ππ, πK, KK and KK scattering are constructed and normalized at the ϱ pole in this paper, and S-wave scattering lengths are calculated in good agreement with those obtained by the method of current algebra.

TL;DR: In this paper, infinite product representations possessing meromorphy in s and t as well as polynomial residues are investigated and the representations turn out to have Regge behavior and non-linear trajectories and to include the Suzuki-Veneziano form as a limiting case.

TL;DR: In this article, the point-like behavior of neutrino scattering cross-sections in the deep inelastic continuum has been determined and shown to exhibit the scale invariance, previously observed in electroproduction experiments.

TL;DR: In this paper, the Hamada-Johnston interaction was used to calculate the negative parity particle hole excitations of 40 Ca and 48 Ca with and without the inclusion of core polarizations, and the calculated energies of the low-lying states of 48 Ca were in significantly better agreement with experiment than for 40 Ca when the core-deformation components are not included in the wave functions for both nuclei.

TL;DR: The electromagnetic form factor of the pion has been determined in the ϱo resonance region by measuring the absolute cross section of the reaction e+e−→π+π− with the Orsay storage ring.

TL;DR: In this article, the results of the three Orsay experiments were analyzed in the vector meson dominance hypothesis and the coupling constants of ϱ o, ω o and φ o mesons to the photons were determined.

TL;DR: In this paper, the isotope and isotone shifts in the nuclear charge radius and the thickness of the neutron skin are calculated for nuclei along beta stability by means of the droplet model.

TL;DR: In this article, the Coulomb energy differences between nuclear states that are members of an isobaric-spin multiplet were measured and the radius of the excess nucleons was found.

TL;DR: In this paper, a Veneziano-type formula for the N -point function where the external lines may have any (integral) spins is proposed, and the resulting amplitude is expected to have the following properties: (i) analyticity, (ii) crossing symmetry, (iii) Dolen-Horn-Schmid duality, (iv) resonance poles on linear rising trajectories, (v) Regge asymptotic behaviour in all Mandelstam channels, and (ii), treating all particles consistently as bound states of one another.

TL;DR: The consequences for experiments involving solar neutrinos of a small amount of lepton nonconservation are examined following the discussion of Gribov and Pontecorvo in this paper.

TL;DR: Explicit formulas for the N-point function in the generalized Veneziano model as an infinite sum over lower-order functions are presented in this paper and the form of the amplitude exhibits clearly its physical interpretation as is believed to be useful for theoretical and practical applications.