E2/M1 MIXING-RATIO OF DELTA-]N-GAMMA AND HYPERON RESONANCE RADIATIVE DECAY

被引：50

作者：

BUTLER, MN

SAVAGE, MJ

SPRINGER, RP

机构：

[1] UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093

[2] DUKE UNIV,DEPT PHYS,DURHAM,NC 27708

来源：

PHYSICS LETTERS B | 1993年 / 304卷 / 3-4期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0370-2693(93)90308-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We complete the leading contribution to the E2/M1 mixing ratio of the decay DELTA-->Ngamma in heavy baryon chiral perturbation theory. We find the mixing ratio to be 4% less than or similar to \delta(E2/M1)\ less than or similar to 11%, much larger than estimates based on the quark model and other hadronic models. We also compute the mixing ratio for the radiative decay of the hyperon resonances. The decays SIGMA*+ --> SIGMA+gamma and XI*- --> XI- gamma provide a particularly sensitive probe of deviations from heavy baryon spin-flavour SU(6).

引用

页码：353 / 358

页数：6

共 18 条

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BERNSTEIN AM, 1993, IN PRESS PHYS REV C

[2]

BUTLER MN, UCSDPTH9237 PREPR

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