Approximate Higgs alignment without decoupling

TL;DR

This paper explores the possibility of achieving Higgs boson properties similar to the Standard Model without requiring additional Higgs particles to be very heavy, focusing on alternative alignment mechanisms.

Contribution

It investigates the feasibility of approximate Higgs alignment without relying on the decoupling limit, offering new insights into Higgs sector models.

Findings

Approximate Higgs alignment can occur without decoupling.

Viability of non-decoupling alignment mechanisms is demonstrated.

Implications for extended Higgs sector phenomenology.

Abstract

The properties of the Higgs boson, h(125), observed in LHC data are consistent with Standard Model predictions. Consequently, if additional Higgs bosons are present, then the direction of h(125) in field space must be approximately aligned with the direction of the Higgs vacuum expectation value. One way to achieve approximate Higgs alignment is in the decoupling limit, where all additional Higgs scalars are significantly heavier than the h(125). In this presentation, the viability of approximate Higgs alignment without decoupling is addressed.