What can we learn from the Z → bb vertex?

1995/05/31 by D. Comelli, Denis Comelli, Comelli, Denis
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9505439

4 pages,no figures, to appear in Proc. of XXXth Rencontres de Moriond Les Arcs France

arxiv created 1995/05/31 · openalex publication_date 1995/05/31 · arxiv updated 2016/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

I stress the fact that a complete study of possible New Physics effects in the Z → bb vertex requires a combined analysis of the ratio R_b= Γ(Z → bb)/ Γ(Z → hadrons) and the longitudinally polarized forward backward asymmetry, A_b. This is illustrated with a number of models such as the two Higgs-doublet model, the MSSM, Technicolour and models with an extra Z'. The use of effective lagrangean techniques is briefly discussed.

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