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Nucleon-nucleon-scattering in the 0-6 GeV range and the relativistic optical-model based on deep attractive forbidden state potentialsстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Neudatchin VG, Yudin NP, Dorodnykh Yl, Obukhovsky IT
- Журнал: Physical Review C - Nuclear Physics
- Том: 43
- Номер: 6
- Год издания: 1991
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 2499
- Последняя страница: 2508
- DOI: 10.1103/PhysRevC.43.2499
- Аннотация: The optical relativistic model based on deep attractive forbidden state quasipotentials describes well the angular and energy dependence of differential np- and pp-scattering cross sections and polarizations, including the transition from the U-shaped form of the angular distributions of np scattering to forward scattering at the energy E(lab) greater-than-or-equal-to 1 GeV, when the scattering P-phase shifts, equal to pi at low energies, pass through pi/2 (the triplet and singlet S-phase shifts start from the values 2-pi and pi, respectively). The higher scattering phase shifts (L greater-than-or-equal-to 2) are small everywhere. The potentials are determined from the scattering phase shifts in the low-energy region E(lab) < 1 GeV. They have been chosen in the simple Gaussian form and for different partial waves they differ in depth and width (from V0 = 0.73 GeV, a = 0.85 fm to V0 = 2.40 GeV, a = 0.45 fm). A few negative phase shifts 3D1, 3F3, 3G3, which reflect the peripheral repulsion due to the spin-orbital and tensor interactions, are calculated by means of the one-boson-exchange potential periphery matched to the central attraction. The imaginary part W of the optical potential V + iW is determined by the value sigma-tot/sigma-el and grows rapidly with increase in the energy E(lab), so that the phase-shift values lose sensitivity to the real part V of optical potential if E(lab) exceeds 5 GeV. Finally, the quantum chromodynamics (QCD) effects are discussed which may underlie the potentials considered.
- Добавил в систему: Воронина Екатерина Николаевна