Can light nambu-goldstone boson loops counter the “S argument” against technicolor?

Sean Fleming, Ivan Maksymyk

Research output: Contribution to journalArticle

2 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)2781-2788
Number of pages8
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume53
Issue number5
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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