Results 211 to 220 of about 88,487 (267)
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On generalised dispersion relations
Il Nuovo Cimento, 1956A relation is derived which connects the real part of the non forward meson-nucleon scattering amplitude, to its imaginary part.
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Dispersion relation for effective interactions
Physical Review C, 1990It is argued that the real and imaginary parts of the effective potential operator for scattering problems obey a dispersion relation also when the Hamiltonian is not Hermitian. Model calculations are used to demonstrate that the equivalent local potential approximately satisfies the dispersion relation when absorption is present. It is also shown that
, Carlson +4 more
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On the dispersion relations for the compton effect
Nuclear Physics, 1958Abstract A basis underlying the deduction of the dispersion relations for the Compton effect on nucleons in the absence of an unobservable energy region is presented.
Logunov, A. A., Frenkin, A. R.
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On the Proof of Parametric Dispersion Relations
Physical Review, 1961Parametric dispersion relations for the connected timeordered Green's functions, conjectured on the basis of perturbation theory, are shown to exist for the special ease of decay processes. Extension of the proof to scattering and production depends upon the possibility of continuing one or more of the energy varlables to negative values. (auth)
Fried, H. M., Pursey, D. L.
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Dispersion-Relation Fluorescence Spectroscopy
Physical Review Letters, 2012Because of its ability to study specifically labeled structures, fluorescence microscopy is the most widely used technique for investigating live cell dynamics and function. Fluorescence correlation spectroscopy is an established method for studying molecular transport and diffusion coefficients at a fixed spatial scale.
Ru, Wang +4 more
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Dispersion Relations for Production Amplitudes. I
Physical Review, 1961>The Logunov dispersion relation for production amplitudes is discussed. It is shown that this relation is invalid, i.e., that the production amplitude has complex singularities when regarded as a function of the Logunov variables. The reaction pi + N yields pi + pi + N is analyzed by perturbation theory, and it is found that 4 of the 5 independent ...
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Dispersion relations in the Lee Model
Nuclear Physics, 1960Abstract The self energy and the wave function renormalization constant in the Lee Model are calculated with the technique of dispersion relations. The results agree with those obtained in the usual manner.
de Celles, Paul, Feldman, Gordon
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Dispersion relations for form factors
Il Nuovo Cimento, 1958The dispersion relations for form factors are studied in perturbation theory. In particular, the relations are proved for a realistic nucleon in the form usually assumed in literature. It is demonstrated, however, that in more general cases the mass spectrum in the dispersion relations depends on the masses of the contributing particles in a peculiar ...
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Bound States and Dispersion Relations
Physical Review, 1960A vertex closely related to the Bethe-Salpeter amplitude is discussed in the one meson exchange approximation by dispersion theory methods. Both scalar and spinor cases are treated. The relation between anomalous thresholds and the Schr\"odinger equation is discussed in some detail.
Blankenbecler, R., Cook, L. F. jun.
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Dispersion Relations for Bloch Functions
Physical Review, 1960It is shown that the Floquet factor ${e}^{\mathrm{ik}(E)a}$ is analytic in the upper half complex energy plane, thus enabling a set of four dispersion relations to be derived from this expression as a direct result of the application of Cauchy's theorem.
Kaus, Peter E., Watson, W. K. R.
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