Electroweak corrections to the charm quark contribution to K{sup +}{yields}{pi}{sup +}{nu}{nu}
Journal Article
·
· Physical Review. D, Particles Fields
- Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)
We compute the leading-log QED, the next-to-leading-log QED-QCD, and the electroweak corrections to the charm quark contribution relevant for the rare decay K{sup +}{yields}{pi}{sup +}{nu}{nu}. The corresponding parameter P{sub c}(X) is increased by up to 2% with respect to the pure QCD estimate to P{sub c}(X)=0.372{+-}0.015 for m{sub c}(m{sub c})=(1.286{+-}0.013)GeV, {alpha}{sub s}(M{sub Z})=0.1176{+-}0.0020, and |V{sub us}|=0.2255. For the branching ratio we find B(K{sup +}{yields}{pi}{sup +}{nu}{nu})=(8.5{+-}0.7)x10{sup -11}, where the quoted uncertainty is dominated by the Cabibbo-Kobayashi-Maskawa elements.
- OSTI ID:
- 21250610
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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