2020 Impact factor 4.590
Particles and Fields
Eur. Phys. J. C 28, 55-61 (2003)
DOI: 10.1140/epjc/s2003-01151-3

A flexible parameterization of the CKM matrix via the singular-value-decomposition method

C.S. Kim and J.D. Kim

Department of Physics and IPAP, Yonsei University, Seoul 120-749, Korea

(Received: 27 November 2002 / Published online: 7 March 2003 )

We investigate a flexible method by which we can test the unitarity of the quark flavor-mixing matrix step by step. Singular-value-decomposition (SVD) techniques are used in analyzing the mixing matrix over a broader parameter region than the unitarity region. Unitary constraints let us extract CP-violating properties without any specific parameterization when the magnitudes of at least three mixing-matrix elements in three-generation quark mixing are given. This method can also be applied to the analysis of lepton flavor mixing, in which only a few moduli are presently measured.

© Società Italiana di Fisica, Springer-Verlag 2003