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

Abstract

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.

16 pages, 2 figures, 11 tables

Cited by in corpus (18)

• Theory and phenomenology of two-Higgs-doublet models
• Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests
• Radiative Corrections to the $Zb\bar{b}$ Vertex and Constraints on Extended Higgs Sectors
• Charged-Higgs phenomenology in the Aligned two-Higgs-doublet model
• The Two Higgs Doublet of Type II facing flavour physics data
• The Custodial Randall-Sundrum Model: From Precision Tests to Higgs Physics
• Testing the custodial symmetry in the Higgs sector of the Georgi-Machacek model
• Massive Color-Octet Bosons: Bounds on Effects in Top-Quark Pair Production
• Enhancement of h --> gamma gamma in the Two Higgs Doublet Model Type I
• Alternative Interpretation of the Tevatron Top Events
• Very light CP-odd scalar in the Two-Higgs-Doublet Model
• Z-Decays to b Quarks and the Higgs Boson Mass
• The Indirect Limit on the Standard Model Higgs Boson Mass from the Precision FERMILAB, LEP and SLD Data
• A Study of the LEP and SLD Measurements of $A_b$
• The dynamical models and the $Z\to b\bar{b}$ asymmetry}
• The Experimental Status of the Standard Electroweak Model at the End of the LEP-SLC Era
• Fitting the $Zb\bar{b}$ vertex in the two-Higgs-doublet model and in the three-Higgs-doublet model
• The $Zb\bar{b}$ vertex in a left-right model