Indications for an Anomalous Right-Handed Coupling of the b-Quark from a Model Independent Analysis of LEP and SLD Data on Z-Decays

Details Indications for an Anomalous Right-Handed Coupling of the b-Quark from a Model Independent Analysis of LEP and SLD Data on Z-Decays Indications for an Anomalous Right-Handed Coupling of the b-Quark from a Model Independent Analysis of LEP and SLD Data on Z-Decays

1998-01-20

arxiv.org/abs/hep-ph/9801355v2

Mod.Phys.Lett. A13 (1998) 1937-1954

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 2 figures, 11 tables

Scientific paper

10.1142/S0217732398002059

A model independent analysis is made using the LEP and SLD data on Z decays available at the end of 1996. The effective weak coupling constants of leptons, c quarks and b quarks are extracted. Except for the right-handed b quark coupling, they all agree well with the predictions of the Standard Electroweak Model for $m_t = 172$ GeV and $m_H = 263$ GeV. The right-handed b quark coupling is found to be 42% and 3.2 standard deviations above the Standard Model prediction.

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