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Quark Mass Ratios in Semi‐Leptonic Quark Decays
Author(s) -
NIR YOSEF
Publication year - 1989
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1989.tb50624.x
Subject(s) - particle physics , physics , top quark , up quark , quark , top quark condensate , down quark , nuclear physics , bottom quark
An ambiguity in the calculation of CKM matrix elements from semi-leptonic decay rates is resolved: to every choice of scales for the quark masses in the phase- space factor and in the QCD-correction factor, there corresponds a specific QCD- correction factor. This factor is modified in such a way as to make the final result independent of the scales. Specific expressions are given for the case of on-shell quark masses and for the case where both masses are taken at a single common scale. A calculation of lVcbl and IVub/Vcb 1 is carried out in view of these clarifications.