K-L4 DECAYS BEYOND ONE-LOOP

被引：122

作者：

BIJNENS, J

COLANGELO, G

GASSER, J

机构：

[1] UNIV BERN,CH-3012 BERN,SWITZERLAND

[2] UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY

来源：

NUCLEAR PHYSICS B | 1994年 / 427卷 / 03期

关键词：

D O I：

10.1016/0550-3213(94)90634-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The matrix elements for K --> pi pi l nu decays are described by four form factors F, G, H and R. We complete previous calculations by evaluating R at next-to-leading order in the low-energy expansion. We then estimate higher order contributions using dispersion relations and determine the low-energy constants L(1), L(2) and L(3) from data on K-e4 decays and on elastic pion scattering. Finally, we present predictions for the slope of the form factor G and for total decay rates.

引用

页码：427 / 454

页数：28

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