Constraining the Doublet Left-Right Model

TL;DR

This paper investigates an alternative Left-Right Model with doublet Higgs fields, analyzing its parameter constraints using electroweak precision data and neutral-meson mixing observables to understand parity violation.

Contribution

It introduces and constrains a novel Left-Right Model featuring doublet Higgs fields instead of triplets, expanding the theoretical landscape of parity violation models.

Findings

Constraints on model parameters derived from electroweak precision tests.

Limits established using neutral-meson mixing observables.

Model viability assessed through combined statistical analysis.

Abstract

Left-Right Models (LRM) attempt at giving an understanding of the violation of parity (or charge-conjugation) by the weak interactions in the SM through a similar description of left- and right-handed currents at high energies. The spontaneous symmetry breaking of the LRM gauge group is triggered by an enlarged Higgs sector, usually consisting of two triplet fields (left-right symmetry breaking) and a bidoublet (electroweak symmetry breaking). I reconsider an alternative LRM with doublet instead of triplet fields. After explaining some features of this model, I discuss constraints on its parameters using electroweak precision observables (combined using the CKMfitter frequentist statistical framework) and neutral-meson mixing observables.