Bounds on $g_5^Z$ from Precision LEP Measurements

Abstract

The parity violating but CP conserving anomalous three-gauge-boson coupling $g_5^Z$ induces a universal contribution to the left-handed coupling of the $Z$ boson to fermions. We find that the LEP measurements of the partial $Z$ widths and lepton forward-backward asymmetries are sufficiently precise to place a bound of order $|g_5^Z|$ less than $\sim 10\%$. This bound is significantly better than what can be obtained at present from rare $K$ and $B$ meson decays.

Phys. Lett. B333 (1994) 207. A few minor errors in the table are corrected and updated experimental and theoretical numbers are used. The conclusions are unchanged. These changes will appear in an erratum to the published paper

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Cited by in corpus (10)

• Disentangling a dynamical Higgs
• Low-Energy Constraints on New Physics Revisited
• Bounds on Anomalous Gauge Boson Couplings From Partial Z Widths at LEP
• Scrutinizing the ZW+W- vertex at the Large Hadron Collider at 7 TeV
• Triple Gauge Boson Couplings in Rare B and K Decays
• Study of Anomalous Couplings at a $500$~GeV $e^{+}{e}^{-}$ Linear Collider with Polarized Beams
• Left-right non-linear dynamical Higgs
• Probing Trilinear Gauge Boson Interactions via Single Electroweak Gauge Boson Production at the LHC
• Contributions of LEP1.5, LEP2 and linear-collider data to indirect constraints on non-Abelian gauge-boson couplings
• Anomalous g^5_z coupling at $\gamma \gamma$ colliders