A precision constraint on multi-Higgs-doublet models
W. Grimus, L. Lavoura, O.M. Ogreid, P. Osland
TL;DR
This paper derives a general formula for the electroweak precision parameter Delta rho in multi-Higgs-doublet models, providing a way to constrain scalar particle properties based on experimental bounds.
Contribution
It presents a comprehensive expression for Delta rho applicable to models with multiple scalar doublets and singlets, extending previous analyses.
Findings
Derived a general expression for Delta rho in multi-Higgs models
Established constraints on scalar masses and mixings from experimental bounds
Provides a tool for testing multi-Higgs models against electroweak precision data
Abstract
We derive a general expression for Delta rho (or, equivalently, for the oblique parameter T) in the SU(2) x 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 Delta rho constitutes a strong constraint on the masses and mixings of the scalar particles in that model.
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