New Spectra in the Heidi Models

TL;DR

This paper investigates HEIDI models, higher-dimensional scalar extensions of the standard model, comparing their predictions with LHC data and discussing potential experimental signatures like a broad Higgs width.

Contribution

It introduces and analyzes HEIDI models, demonstrating their compatibility with current LHC data and proposing future experimental tests to distinguish them from the standard model.

Findings

HEIDI models can fit current LHC data

Higgs width could be in the GeV range in these models

Further experiments are needed to differentiate from the standard model

Abstract

We study the so-called HEIDI models, which are renormalizable extensions of the standard model with a higher-dimensional scalar singlet field. We compare their predictions with the recent results from the LHC. We show that the data can easily be described by the HEIDI models. However more data are necessary in order to distinguish these models from the standard model. A particular prediction is that the width of the Higgs could be in the GeV range. Such a width could be difficult to establish at the LHC. Suggestions for experiments beyond the LHC are made.