CP-odd WWZ couplings induced by vector-like quarks

Details CP-odd WWZ couplings induced by vector-like quarks CP-odd WWZ couplings induced by vector-like quarks

1999-02-26

arxiv.org/abs/hep-ph/9902478v2

Eur.Phys.J.C10:327-330,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 Postscript figures, figure sizes changed

Scientific paper

10.1007/s100529900117

A minimal extension of the standard model includes extra quarks with charges 2/3 and/or -1/3, whose left-handed and right-handed components are both SU(2) singlets. This model predicts new interactions of flavor-changing neutral current at the tree level, which also violate CP invariance. We study CP-odd anomalous couplings for the gauge bosons W, W, and Z induced by the new interactions at the one-loop level. These couplings become nonnegligible only if both an up-type and a down-type extra quarks are incorporated. Their form factors are estimated to be maximally of order $10^{-5}$. Such magnitudes are larger than those predicted in the standard model, though smaller than those in certain other models.

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