منابع مشابه
A novel approach to multi-photon bremsstrahlung
Radiative processes lead to important corrections to (e, e′p) experiments. While radiative corrections can be calculated exactly in QED and to a good accuracy also including hadronic corrections, these corrections cannot be included into data analyses to arbitrary orders exactly. Nevertheless consideration of multi-photon bremsstrahlung above the low-energy cut-off is important for many (e, e′p...
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We calculate the 0 order in opacity number distribution of massive photons (gluons) for heavy quark production radiation including interference from the away-side jet. While consistent with the soft photon (gluon) approximation, we find that taking 1−x ≈ 1, as done in previous calculations, strongly affects the magnitude of energy loss. Restoring gauge invariance by including the radiation asso...
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An economic technique for calculation of polarized bremsstrahlung process is proposed, assuming typical atomic momentum transfer q ≪ m. The adopted approach is based on the natural reduction of the matrix element to the form V γ + A5γ . Polarization distribution in the fully differential cross-section is analyzed. It is found that at a given momentum transfer to the atom polarization in the pla...
متن کاملRelativistic description of two-photon bremsstrahlung process within the framework of delta-approximation
Approximate approach for description of two-photon bremsstrahlung emitted by the relativistic projectile scattered in a spherically-symmetric filed of the target is suggested. It based on the accurate treatment of the analytical structure of singularities in relativistic one-photon free-free matrix elements. For the case of Coulomb field of the target the closed-form analytical expressions for ...
متن کاملPion - Nucleon Bremsstrahlung beyond the Soft-Photon approximation
A dynamical model based on effective Lagrangians is proposed to describe the bremsstrahlung reaction πN → πNγ at low energies. The ∆(1232) degrees of freedom are incorporated in a way consistent with both, electromagnetic gauge invariance and invariance under contact transformations. The model also includes the initial and final state rescattering of hadrons via a T-matrix with off the momentum...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1990
ISSN: 0550-3213
DOI: 10.1016/0550-3213(90)90571-t