Simple approach to renormalize the Cabibbo-Kobayashi-Maskawa matrix.

@article{Kniehl2006SimpleAT,
  title={Simple approach to renormalize the Cabibbo-Kobayashi-Maskawa matrix.},
  author={Bernd A. Kniehl and Alberto Sirlin},
  journal={Physical review letters},
  year={2006},
  volume={97 22},
  pages={
          221801
        }
}
We present an on-shell scheme to renormalize the Cabibbo-Kobayashi-Maskawa (CKM) matrix. It is based on a novel procedure to separate the external-leg mixing corrections into gauge-independent self-mass and gauge-dependent wave function renormalization contributions, and to implement the on-shell renormalization of the former with nondiagonal mass counterterm matrices. Diagonalization of the complete mass matrix leads to an explicit CKM counterterm matrix, which automatically satisfies all the… 
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