Double Higgs production at LHC, see-saw type II and Georgi-Machacek model

TL;DR

This paper investigates double Higgs production in models with isospin-triplet scalars, showing potential for enhanced cross sections in the Georgi-Machacek model compared to the Standard Model, with implications for LHC experiments.

Contribution

It analyzes double Higgs production in see-saw type II and Georgi-Machacek models, highlighting possible cross section enhancements and experimental signatures.

Findings

In see-saw type II, the cross section can match the Standard Model.

In Georgi-Machacek, the cross section can be significantly larger.

Triplet vacuum expectation value influences production rates.

Abstract

The double Higgs production in the models with isospin-triplet scalars is studied. It is shown that in the see-saw type II model the mode with an intermediate heavy scalar, $pp\to H+X\to 2h+X$, may have the cross section which is compatible with that in the Standard Model. In the Georgi-Machacek model this cross section could be much larger than in SM since the vacuum expectation value of the triplet can be large.