Did one observe couplings of right-handed quarks to W ?

TL;DR

This paper investigates non-standard right-handed quark couplings to W and Z bosons, proposing new experimental tests and providing a successful fit to existing electroweak data within an effective theory framework.

Contribution

It introduces a systematic low-energy effective theory approach to explore non-standard right-handed quark couplings and discusses new experimental tests and data fits.

Findings

Successful NLO fit to Z-pole and NC data

Proposed new tests in K^L_{mu3} decays

Analysis of scalar form factors

Abstract

I consider non standard EW couplings of light right-handed quarks to W and Z suggested in a systematic non decoupling bottom-up low-energy effective theory approach to possible extensions of the Standard Model. New experimental tests in K^L_{mu3} decays based on recent measurements and scalar form factor analysis are discussed. A successful NLO fit to the standard set of Z-pole and other NC data is presented as well.