A precision constraint on multi-Higgs-doublet models

By W. Grimus, L. Lavoura, O. M. Ogreid, P. Osland. 2007

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We derive a general expression for Δρ (or, equivalently, for the oblique parameter T) in the SU(2) × U(1) electroweak model with an arbitrary number of scalar SU(2) doublets, with hypercharge ±1/2, and an arbitrary number of scalar SU(2) singlets. The experimental bound on Δρ constitutes a strong constraint on the masses and mixings of the scalar particles in that model.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/29f6315133af48b5b433bc13ff43cfa204d7ecbb