The Top Quark Decay Vertex in Standard Model Extensions

Details The Top Quark Decay Vertex in Standard Model Extensions The Top Quark Decay Vertex in Standard Model Extensions

2008-12-09

arxiv.org/abs/0812.1643v1

Eur.Phys.J.C60:197-211,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 27 pages, 14 figures

Scientific paper

10.1140/epjc/s10052-009-0887-4

New physics interactions can affect the strength and structure of the $tbW$ vertex. We investigate the magnitudes and phases of "anomalous" contributions to this vertex in a two-Higgs doublet and the minimal supersymmetric extension of the standard model, and in a top-color assisted technicolor (TC2) model. While the magnitudes of the anomalous couplings remain below 1 percent in the first two models, TC2 interactions can reduce the left-chiral coupling $f_L$ by several percent.

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