The Ω-→Ξ-γ radiative decay:: A QCD sum rule approach

被引：0
|
作者：
Nielsen, M [1 ]
Barreiro, LA [1 ]
Escobar, CO [1 ]
Rosenfeld, R [1 ]
机构：
[1] Univ Sao Paulo, Inst Fis, BR-5389970 Sao Paulo, Brazil
来源：
INTERNATIONAL WORKSHOP ON HADRON PHYSICS 96: TOPICS ON THE STRUCTURE AND INTERACTION OF HADRONIC SYSTEMS | 1997年
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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：
QCD sum rules are used to calculate the contribution of short-distance single-quark transition s --> d gamma, to the amplitudes of the hyperon radiative decay, Omega(-) --> Xi(-)gamma. We re-evaluate the Wilson coefficient of the effective operator responsible for this transition. We obtain a branching ratio which is comparable to the unitarity limit.
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页码：275 / 281
页数：7
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