An effective field theory calculation of the QCD corrections to weak parameters
- Superconducting Super Collider Lab., Dallas, TX (United States)
- Harvard Univ., Cambridge, MA (United States). Lyman Lab. of Physics
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.
- Research Organization:
- Superconducting Super Collider Lab., Dallas, TX (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Texas National Research Lab. Commission, De Soto, TX (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC35-89ER40486
- OSTI ID:
- 68160
- Report Number(s):
- SSCL-Preprint-13; HUTP-90/A029; ON: DE95011255; CNN: G phy-87-14654; G rgfy9106
- Resource Relation:
- Other Information: PBD: Nov 1991
- Country of Publication:
- United States
- Language:
- English
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