Analysis of two-body decays of charmed baryons using the quark-diagram scheme.
Analysis of two-body decays of charmed baryons using the quark-diagram scheme.
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DOI：
10.1103/physrevd.54.2132
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发表时间：
1995-08
期刊：
影响因子：
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通讯作者：
L. Chau;Hai-Yang Cheng;B. Tseng
中科院分区：
文献类型：
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作者：
L. Chau;Hai-Yang Cheng;B. Tseng
给出了重子非轻子弱衰变的夸克图格式的一般表述。我们将其应用于反三重态和六重态粲重子的所有衰变，并用夸克图振幅表示它们的衰变振幅。我们也给出了最终态相互作用影响的参数化。对于SU(3)破坏效应，我们只对水平{大写W}环夸克图中仅由SU(3)破坏效应贡献的夸克图进行参数化。在没有这些效应的情况下，不同的衰变模式之间存在许多关系。当关系中的每个衰减幅度只包含一个相移时，即使存在末态相互作用，其中一些关系也是有效的。所有这些关系都提供了有用的框架来与未来的实验进行比较，并找到最终状态相互作用和SU(3)对称性违反的影响。{版权所有}{ital 1996美国物理学会。}
We give a general formulation of the quark-diagram scheme for the nonleptonic weak decays of baryons. We apply it to all the decays of the antitriplet and sextet charmed baryons and express their decay amplitudes in terms of the quark-diagram amplitudes. We have also given parametrizations for the effects of final-state interactions. For SU(3) violation effects, we only parametrize those in the horizontal {ital W}-loop quark diagrams whose contributions are solely due to SU(3)-violation effects. In the absence of all these effects, there are many relations among various decay modes. Some of the relations are valid even in the presence of final-state interactions when each decay amplitude in the relation contains only a single phase shift. All these relations provide useful frameworks to compare with future experiments and to find the effects of final-state interactions and SU(3) symmetry violations. {copyright} {ital 1996 The American Physical Society.}