The unitarity problem

The unitarity problem
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单一性问题

DOI:
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发表时间:
2003
期刊:
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影响因子:
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通讯作者:
N. Severijns
N. Severijns
中科院分区:
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文献类型:
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作者:
H. Abele;E. Barberio;D. Dubbers;A. Serebrov;N. Severijns

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在基本粒子的标准模型中,夸克混合用一个3 × 3的酉矩阵V表示,即所谓的Cabibbo-Kobayashi-Maskawa(CKM)矩阵。到目前为止,对于该矩阵的第一行可以进行显著的酉性检查。本文综述了这些矩阵元素的实验和理论信息。在实验方面,我们发现与幺正性有2.2到2.7的偏差,这与标准模型相冲突。
In the Standard Model of elementary particles, quark-mixing is expressed in terms of a 3 x 3 unitary matrix V , the so called Cabibbo-Kobayashi-Maskawa (CKM) matrix. Significant unitarity checks are so far possible for the first row of this matrix. This article reviews the experimental and theoretical information on these matrix elements. On the experimental side, we find a 2.2 � to 2.7 � deviation from unitarity, which conflicts with the Standard Model.