Modern NN force predictions for the total nd cross section up to 300 MeV

Citation
H. Witala et al., Modern NN force predictions for the total nd cross section up to 300 MeV, PHYS REV C, 59(6), 1999, pp. 3035-3046
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
59
Issue
6
Year of publication
1999
Pages
3035 - 3046
Database
ISI
SICI code
0556-2813(199906)59:6<3035:MNFPFT>2.0.ZU;2-Z
Abstract
For several modern nucleon-nucleon potentials state-of-the-art Faddeev calc ulations are carried out for the nd total cross section between 10 and 300 MeV projectile energy and compared to new high precision measurements. The agreement between theory and data is rather good, with an exception at high er energies when a 10% discrepancy builds up. In addition the convergence o f the multiple scattering series incorporated in the Faddeev scheme is stud ied numerically with the result that rescattering corrections remain import ant. Based on this multiple scattering series the high energy limit of the total nd cross section is also investigated analytically. In contrast to th e naive expectation that the total nd cross section is the sum of the np an d nn total cross sections we find additional effects resulting from the res cattering processes, which have different signs and a different behavior as a function of the energy. A shadowing effect in the high energy limit only occurs for energies higher than 300 MeV. The expressions in the high energ y limit have qualitatively a similar behavior as the exactly calculated exp ressions, but can be expected to be valid quantitatively only at much highe r energies.