Has a coupling of right-handed quarks to W been observed? - Archive ouverte HAL
Communication Dans Un Congrès Année : 2008

Has a coupling of right-handed quarks to W been observed?

Micaela Oertel

Résumé

Stringent tests of non-standard electroweak (EW) couplings of (light) quarks are rare because it is not easy to disentangle QCD and EW quantities. We will discuss here a recently proposed test of right-handed charged quark currents, based on Kl3 decay data and the prediction of the Callan-Treiman low energy theorem. Non-standard couplings of fermions to W and Z are suggested by the minimal low-energy effective electroweak theory (LEET) to be the dominant new physics effects. It is shown that coherent values for these couplings emerge from an analysis of Z-pole observables, too, curing in particular the long-standing AbFB puzzle.

Dates et versions

hal-03743640 , version 1 (02-08-2022)

Identifiants

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Micaela Oertel. Has a coupling of right-handed quarks to W been observed?. The 2007 Europhysics Conference On High Energy Physics, Jul 2007, Manchester, England, United Kingdom. pp.2029, ⟨10.1088/1742-6596/110/7/072029⟩. ⟨hal-03743640⟩
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