Journal articles
Tests of non-standard electroweak couplings of right-handed quarks
Abstract : The standard model can be interpreted as the leading order of a Low-Energy Effective Theory (LEET) invariant under a higher non linearly realized symmetry Snat ⊃ SU(2)W × U(1)Y equipped with a systematic power counting. Within the minimal version of this ``not quite decoupling'' LEET, the dominant non-standard effect appears at next-to-leading order (NLO) and is a modification of the couplings of fermions to W and Z. In particular, the coupling of right-handed quarks to Z is modified and a direct coupling of right-handed quarks to W emerges. Charged right-handed lepton currents are forbidden by an additional discrete symmetry in the lepton sector originally designed to suppress Dirac neutrino masses. A complete NLO analysis of experimental constraints on these modified couplings is presented. Concerning couplings of light quarks, the interface of the electroweak tests with QCD aspects is discussed in detail.
http://hal.in2p3.fr/in2p3-00421196
Contributor : Sophie Heurteau <>
Submitted on : Thursday, October 1, 2009 - 10:57:45 AM
Last modification on : Wednesday, September 23, 2020 - 4:40:01 AM
Contributor : Sophie Heurteau <>
Submitted on : Thursday, October 1, 2009 - 10:57:45 AM
Last modification on : Wednesday, September 23, 2020 - 4:40:01 AM
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