Higher threshold parameters in ππ scattering

被引：9

作者：

Ananthanarayan, B ^{[1
]}

Buttiker, P

机构：

[1] Indian Inst Sci, Ctr Theoret Studies, Bangalore 560012, Karnataka, India

[2] Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland

来源：

PHYSICS LETTERS B | 1997年 / 415卷 / 04期

关键词：

sum rules; pi pi scattering; chiral perturbation theory;

D O I：

10.1016/S0370-2693(97)01231-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A family of threshold parameters which probe the stability of chiral predictions is considered. The relevant criteria for the choice of threshold parameters are discussed. Sum rules for these quantities are derived from dispersion relations and evaluated from effective range formulae. Good agreement with two-loop chiral estimates for many of these quantities is found and interesting discrepancies are discussed. (C) 1997 Elsevier Science B.V.

引用

页码：402 / 410

页数：9

共 23 条

[1] Chiral coupling constants (l)over-bar(1) and (l)over-bar(2) from pi pi phase shifts [J].