Quark Mixing, CKM Unitarity


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 σ to 2.7 σ deviation from unitarity, which conflicts with the Standard Model. PACS. PACS-key 12.15.Hh, 12.15Ff, 13.30.Ce, 23.40.Bw

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@inproceedings{SeverijnsQuarkMC, title={Quark Mixing, CKM Unitarity}, author={Nathal Severijns} }