An effective field theory calculation of the QCD corrections to weak parameters
An effective field theory calculation of the QCD corrections to weak parameters
In the standard model the parameters {rho} and M{sub W}{sup 2}/M{sub Z}{sup 2}cos{sup 2}{theta} are unity at tree level. They are protected against large corrections by the so-called custodial symmetry. We investigate the symmetry breaking effect of effect of mass splittings in fermion doublets. The effective field theory method is applied to sum up the leading-log QCD corrections. We resolve a controversy concerning the scale at which the strong coupling constant is to be evaluated in the two-loop correction to electorweak parameters.
- University of North Texas United States
- Harvard University United States
Intermediate Vector Bosons, Standard Model, Radiative Corrections, Unified Gauge Models, 66 Physics, Field Theories, Quantum Chromodynamics, Weinberg Angle, Rest Mass, Symmetry Breaking, 530
Intermediate Vector Bosons, Standard Model, Radiative Corrections, Unified Gauge Models, 66 Physics, Field Theories, Quantum Chromodynamics, Weinberg Angle, Rest Mass, Symmetry Breaking, 530
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