Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-05-06
Phys.Rev. D62 (2000) 073010
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages; reference added; input parameters updated according to 2000 PDG report; accepted for publication in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.62.073010
We calculate the partial decay widths of the W boson at one loop in the standard model using the on-shell renormalization scheme endowed with a gauge-independent definition of the Cabibbo-Kobayashi-Maskawa (CKM) mixing matrix. We work in $R_\xi$ gauge and explicitly verify that the final expressions are independent of the gauge parameters. Furthermore, we establish the relationship between the on-shell and $\bar{\mathrm{MS}}$ definitions of the CKM matrix, both in its generic form and in the Wolfenstein parameterization. As a by-product of our analysis, we recover the beta function of the CKM matrix.
Kniehl Bernd A.
Madricardo Fantina
Steinhauser Matthias
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