Abstract
We asses a role of the double helicity-flip amplitudes in small-angle elastic pp-scattering and obtain a new unitary bound for the double helicity-flip amplitude F2 in elastic pp-scattering at small values of t on the basis of the U-matrix method of the s-channel unitarization.
Highlights
Discussion of a role and magnitude of helicity-flip amplitudes in small-angle elastic scattering has a long history and is an important issue in the studies of the spin properties of diffraction
The method is based on the unitarity equation for helicity amplitudes of elastic pp-scattering
It was shown that this form of unitarization reproduced correct analytical properties of the scattering amplitude in the complex energy plane much easier compared to the exponential form, where simple singularities of the eikonal function would lead to the essential singularities in the amplitude
Summary
Discussion of a role and magnitude of helicity-flip amplitudes in small-angle elastic scattering has a long history and is an important issue in the studies of the spin properties of diffraction. In this note we use unitarization method based on the U-matrix approach and obtain bounds for the amplitudes F2 and F4 which provide ground for the assumptions on their size and lead to the high-energy bounds for the cross-section difference ∆σT (s). The method is based on the unitarity equation for helicity amplitudes of elastic pp-scattering.
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