Showing papers in "Annals of Physics in 1977"

TL;DR: In this paper, a generalization of classical mechanics is presented, where dynamical variables (functions on the phase space) are assumed to be elements of an algebra with anticommuting generators (the Grassmann algebra).

TL;DR: In this article, a relativistic quantum many-body theory is applied to the study of high-density matter, where baryons are described as interacting with each other via massive scalar and massive vector meson exchange.

TL;DR: In this paper, the authors analyze the logarithmic corrections to ξ-scaling coming from anomalous dimensions and coefficient functions of twist-two operators and compare with electroproduction data for 1 ⩽ Q^2 ⊽ 16 GeV^2.

TL;DR: In this article, it was shown that the causality condition can be replaced by weaker causality conditions, and in some cases removed altogether, and that causality violation cannot prevent the Hawking-Penrose-Geroch singularities.

TL;DR: The Noether operator as mentioned in this paper is a generalization of the canonical stress energy tensor, and it has been shown to be an extremum-energy maximization operator for field theories.

TL;DR: In this paper, an expansion for the Green functions describing electromagnetic waves in the presence of a perfectly conducting boundary is established for any smooth boundary in the domain Im k ⩾ | Re k | of complex wavenumbers k, and the continuation of the convergence domain around k = 0 is shown to depend upon the topology of the boundary.

TL;DR: In this paper, an analysis of the π-sup -/--/sup 4/He scattering in the resonance region is presented, which includes recoil and binding corrections to the elementary amplitude which are used to define the Hamiltonian of the intermediate π -nucleus.

TL;DR: In this paper, the bound state of a Schrodinger operator in the limit of weak coupling was investigated for potentials obeying ∫ (1 + |χ|) | V(x)|dx < ∞.

TL;DR: In this article, the authors study the regularization of the stress energy tensor for massless vector and massless and massive scalar particles propagating in a general background metric, using covariant point-separation techniques.

TL;DR: In this paper, the point-split stress tensor of a conformally invariant scalar field in a spatially flat Robertson-Walker geometry is derived from the short-distance behavior of the corresponding operator products evaluated at separated points.

TL;DR: In this paper, a random-matrix model is used to describe the transformation of kinetic energy of relative motion into intrinsic excitation energy typical of a deeply inelastic heavy-ion collision.

TL;DR: In this article, the authors proposed to renormalize the weak-field perturbation theory of a massive scalar field in two space-time dimensions with the aid of the Pauli-Villars regulator fields.

TL;DR: In this article, the effect of collective instabilities in heavy ion collisions was investigated and the decay rate of excited many-body systems was calculated in RPA and an effective (density-dependent) two-body cross section was obtained.

TL;DR: In this article, a perturbative analysis of the eigenvalues and eigenfunctions of Schrodinger operators of the form −Δ + A + λV, defined on the Hilbert space L2(Rn), is presented.

TL;DR: In this article, the small λ behavior of the ground state energy of the Hamiltonian was studied and it was shown that (−E(λ)) 1 2 = −[ 1 2 λ + aλ 2 lnλ] ∫ dxV(x) + O(λ 2 ).

TL;DR: In this article, the dynamics of the spin orientation, including relaxation, were studied in a two-fluid model, in which the changes in macroscopic physical quantities arising from variation of the Cooper-pair wavefunction are associated with the superfluid component, while those arising from changes in the statistical occupation factors are attributed to the normal components.

TL;DR: In this paper, the one-pion exchange contribution to the nuclear charge and current densities was calculated using a Foldy-Wouthuysen reduction procedure and the time-dependent perturbation theory.

TL;DR: In this article, the quantum chromodynamics with massless quarks and an infinite number of colors is represented as a theory of the noninteracting mesons which lie on rising Regge trajectories.

TL;DR: In this paper, the origin of the Cabibbo angle and other flavor-mixing angles in an ambidextrous SU(2)L × SU( 2)R × U(1) gauge theory of weak and electromagnetic interactions involving 2n quark flavors was investigated.

TL;DR: In this article, a coupled channel theory was developed explicitly for the problem of pion scattering and absorption by a deuteron, and the equations were presented in terms of the integral equations of three-body scattering theory.

TL;DR: In this paper, the strength distribution for an arbitrary excitation is given in terms of a double expansion, and its sum rules by single expansions, in polynomials defined by the initial and final energy spectra.

TL;DR: In this paper, a convenient functional integration method for performing mean-field approximations in quantum field theories was developed, which is illustrated by applying it to a self-interacting φ 4 scalar field theory and a J μ J μ four-Fermion field theory.

TL;DR: In this paper, the expansion of path variations in terms of solutions of Morse's boundary problem is applied in order to evaluate Gaussian path integrals, together with a recently discovered theorem on infinite products of eigenvalues of Sturm-Liouville type operators, which yields an expression for the most general semiclassical propagator.

TL;DR: A renormalizable model of weak interactions based on the gauge group SU(2)L × SU( 2)R × U(1) and incorporating a natural suppression of all flavor-changing neutral currents was proposed in this paper.

TL;DR: In this article, shape observables measuring the intrinsic quadrupole deformation of the nucleus are identified and the consequences of these shape operators for the collective rotational and SU (3) models are derived.

TL;DR: In this paper, a nonstationary solution of the Einstein field equations, corresponding to the field of a radiating rotating body, is presented, which is algebraically special of Petrov type II with a twisting, shear-free, null congruence identical to that of the Kerr metric.

TL;DR: In this article, a spinor affine space-time is introduced and two-component spinors and a basis in spinor space, called "spin frame", are introduced, and global and local gauge transformations of spin frames are defined with GL(2) as the gauge group.

TL;DR: In this paper, the generalized path expansion scheme is defined for path integration in phase-space, and the semiclassical limits to the propagator, both in the momentum and the coordinate representations, are studied.

TL;DR: In this article, the theory of the preceding paper is applied to a number of M1, E2, and E4 electro-magnetic excitations in the (ds)6 space.

TL;DR: In this article, the authors use the Hamilton-Dirac 3 + 1 analysis to clarify the effect of a dynamic gravitational interaction on higher spin or derivative-coupled fields.