4,296 research outputs found
Quasiperiodical low-frequency fluctuations of Sun's radioemission
Effects of chromospheric parameter fluctuations on solar radio emissio
Pionic Degrees of Freedom in Atomic Nuclei and Quasielastic Knockout of Pions by High-Energy Electrons
The nonlinear model of pionic condensate in nuclei by G. Preparata can be
efficiently verified by investigation of the quasielastic knockout process of
pions out of nuclei by high energy electrons. First, a momentum distribution
(MD) of the collective pions has a bright maximum at q=0.3 Gev.Second the
excitation spectrum of a recoil nucleus is concentrated at low energies E
lesser than 1MeV. The results for the pion knockout from mesonic clouds of
individual nucleons are absolutely different. The latter results are presented
both for pion and rho-meson clouds localized on nucleons.Comment: 13 pages, 3 figure
Generalized Goldberg Formula
In this paper we prove a useful formula for the graded commutator of the
Hodge codifferential with the left wedge multiplication by a fixed -form
acting on the de Rham algebra of a Riemannian manifold. Our formula generalizes
a formula stated by Samuel I. Goldberg for the case of 1-forms. As first
examples of application we obtain new identities on locally conformally Kaehler
manifolds and quasi-Sasakian manifolds. Moreover, we prove that under suitable
conditions a certain subalgebra of differential forms in a compact manifold is
quasi-isomorphic as a CDGA to the full de Rham algebra.Comment: 12 pages, accepted for publication in the Canadian Mathematical
Bulleti
- …