Indirect Constraints on the Triple Gauge Boson Couplings from $Z \to b \bar{b}$ Partial Width: An Update

Details Indirect Constraints on the Triple Gauge Boson Couplings from $Z \to b \bar{b}$ Partial Width: An Update Indirect Constraints on the Triple Gauge Boson Couplings from $Z \to b \bar{b}$ Partial Width: An Update

1998-11-18

arxiv.org/abs/hep-ph/9811388v1

Mod.Phys.Lett.A15:1-8,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex file using RevTex. 11 pages

Scientific paper

10.1016/S0217-7323(00)00002-5

We update the indirect bounds on anomalous triple gauge couplings coming from the non-universal one-loop contributions to the $Z \to b \bar{b}$ width. These bounds, which are independent of the Higgs boson mass, are in agreement with the standard model predictions for the gauge boson self-couplings since the present value of $R_b$ agrees fairly well with the theoretical estimates. Moreover, these indirect constraints on $\Delta g^Z_1$ and $g^Z_5$ are more stringent than the present direct bounds on these quantities, while the indirect limit on $\lambda_Z$ is weaker than the available experimental data.

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