Wolfenstein Parametrization at Higher Order: Seeming Discrepancies and Their Resolution
arXiv:1106.0935 · doi:10.1016/j.physletb.2011.08.047
Abstract
In different Wolfenstein parametrizations derived from different exact parametrizations of the Cabibbo-Kobayashi-Maskawa matrix, we explicitly study seeming discrepancies between the matrix elements at the higher order of the expansion parameter $λ$. A systematic way of resolving the seeming discrepancies is proposed. We find that most of the discrepancies can be naturally resolved by a proper redefinition of the numerically small (of order $λ$) parameters. Our approach is further applied to the cases for the Wolfenstein-{\it like} parametrizations, such as the Qin-Ma parametrization.
5 pages, two paragraphs added to explain the motivation for considering various Wolfenstein-like parametrizations; version to appear in PLB