Add to ORKGA simple method to compute QED bound state properties is presented, in which binding energy effects are treated non-perturbatively. It is shown that to take the effects of all ladder Coulomb photon exchanges into account, one can simply perform the derivative of standard QED amplitudes with respect to the external momentum. For example, the derivative of the light-by-light scattering amplitude gives an amplitude for orthopositronium decay to three photons where any number of Coulomb photon exchanges between the e-e+ is included. Various applications are presented. From them, it is shown that binding energy must be treated non-perturbatively in order to preserve the analyticity of positronium decay amplitudes. Interesting perspectives fo...
It is shown that a photon with a specific frequency can be identified with the Dirac mag-netic monop...
The unprecedented precision achieved both in the experimental measurements as well as in the theoret...
Bound state perturbation theory is well established for QED atoms. Today the hyperfine splitting of ...
A simple method to compute QED bound state properties is presented, in which binding energy effects ...
Positronium annihilation amplitudes that are computed by assuming a factorization approximation with...
Bound state calculations in quantum electrodynamics (QED) become unnecessarily complicated in high o...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
The construction of positronium decay amplitudes is handled through the use of dispersion relations....
Abstract: Bound states poles in scattering amplitudes are generated by the divergence of the perturb...
This talk summarizes some results on bound-state properties obtained since the previous (1998) RADCO...
We discuss the ε method as used in various recent QED bound-state calculations by considering mathem...
Despite its very short lifetime positronium provides us with a number of accurate tests of the bound...
Despite its very short lifetime positronium provides us with a number of accurate tests of the bound...
Despite its very short lifetime positronium provides us with a number of accurate tests of the bound...
It is shown that a photon with a specific frequency can be identified with the Dirac mag-netic monop...
The unprecedented precision achieved both in the experimental measurements as well as in the theoret...
Bound state perturbation theory is well established for QED atoms. Today the hyperfine splitting of ...
A simple method to compute QED bound state properties is presented, in which binding energy effects ...
Positronium annihilation amplitudes that are computed by assuming a factorization approximation with...
Bound state calculations in quantum electrodynamics (QED) become unnecessarily complicated in high o...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
In order to fulfill Low's theorem requirements, a new lowest order basis for bound state decay compu...
The construction of positronium decay amplitudes is handled through the use of dispersion relations....
Abstract: Bound states poles in scattering amplitudes are generated by the divergence of the perturb...
This talk summarizes some results on bound-state properties obtained since the previous (1998) RADCO...
We discuss the ε method as used in various recent QED bound-state calculations by considering mathem...
Despite its very short lifetime positronium provides us with a number of accurate tests of the bound...
Despite its very short lifetime positronium provides us with a number of accurate tests of the bound...
Despite its very short lifetime positronium provides us with a number of accurate tests of the bound...
It is shown that a photon with a specific frequency can be identified with the Dirac mag-netic monop...
The unprecedented precision achieved both in the experimental measurements as well as in the theoret...
Bound state perturbation theory is well established for QED atoms. Today the hyperfine splitting of ...