Momentum-space optical model for K+-nucleus scattering

被引：1

作者：

Bydzovsky, P ^{[1
]}

Sotona, M ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Nucl Phys, CZ-25068 Rez, Czech Republic

来源：

CZECHOSLOVAK JOURNAL OF PHYSICS | 1998年 / 48卷 / 08期

关键词：

D O I：

10.1023/A:1022873105513

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The momentum-space optical model of K+-nucleus scattering is analyzed and comparison with other conventional models is shown. The model is based on the multiple scattering formalism in which the optimal factorization approximation is used. Off-energy-shell extension of the elementary K+-nucleon amplitude is neglected which reduces non localities in the optical potential. Predictions of the model are sensitive to the definition of the K+-nucleon energy (energy shifts) but they are independent (1-2%) of a particular form of the covariant K+-nucleus scattering equation (relativistic Lippmann-Schwinger, Gross, Erkelenz-Holinde). The Coulomb distortion in the total cross section is important for Si-28 and Ca-40 at low momenta (approximate to 10%). Off-energy-shell effects in the optical potential are discussed too. Results for the total and reaction cross sections are systematically below the data. The reaction cross sections are in a larger disagreement with the data than the total cross sections.

引用

页码：903 / 924

页数：22

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