Indirect constraints on the triple gauge boson couplings from Z -> b(b)over-bar partial width: An update
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Data
2000-01-10
Autores
Eboli, OJP
Gonzalez-Garcia, M. C.
Novaes, Sérgio Ferraz [UNESP]
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World Scientific Publ Co Pte Ltd
Resumo
We update the indirect bounds on anomalous triple gauge couplings coming from the non-universal one-loop contributions to the Z --> <b(b)over bar> 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(1)(Z) and g(5)(Z) are most 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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Modern Physics Letters A. Singapore: World Scientific Publ Co Pte Ltd, v. 15, n. 1, p. 1-7, 2000.