Renormalization of the EWCL and its Application to LEP2

Abstract

We perform a systematic one-loop renormalization on the electroweak chiral Lagrangian (EWCL) up to $O(p^4)$ operators and construct the renormalization group equations (RGE) for the anomalous couplings. We examine the impact of the triple gauge coupling (TGC) measurement from LEP2 to the uncertainty of the $S-T$ parameter at the $\Lambda =1TeV$, and find that the uncertainty in the TGC measurements can shift $S(\Lambda )$ at least $3.3\sigma$.

Comments: 4 pages, 1 eps figure, uses ws-ijmpa.cls. Paralell talk given at "International Conference on QCD and hadronic Physics", Beijing, China, 16-20 June, 2005