Can light Nambu-Goldstone boson loops counter the ‘‘Sargument’’ against technicolor?
Abstract
We examine the oblique correction phenomenology of one-family technicolor with light pseudo Goldstone bosons. From loop calculations based on a gauged chiral Lagrangian for technicolor we are led to conclude that even though loops with light Goldstone bosons give a negative contribution to S measured at the Z pole, this effect is not sufficiently large to unambiguously counter the ``S argument'' against one-family technicolor. This result cannot be guessed a priori, but must be explicitly calculated. Our analysis entails an extended version of the STU oblique parametrization of Peskin and Takeuchi. In principle, this extended formalism (STUVWX) must be used when there are light new particles in loops. \textcopyright{} 1996 The American Physical Society.
Related Papers
- → Technicolor theories with negative values of the Peskin-Takeuchi electroweak parameterS(1993)26 cited
- → Dynamical Breaking of the Electroweak Theory(2006)2 cited
- → Dynamical Electroweak Breaking: Issues and Challenges(1993)
- Technicolor and Precision Tests of the Electroweak Interactions(1994)