Phenomenology of the standard HVM and 95.4 GeV excess

TL;DR

This paper explores a modified Hierarchical VEVs Model that predicts distinctive collider signatures, explains the 95.4 GeV di-photon excess, and introduces a neutrino-interacting dark matter candidate, testable at future colliders.

Contribution

It proposes a new version of the HVM that avoids flavor issues, explains the 95.4 GeV excess, and introduces a novel neutrino-philic dark matter candidate.

Findings

Model predicts detectable collider signatures at future colliders.

One pseudoscalar accounts for the 95.4 GeV di-photon excess.

Introduces a neutrino-philic dark matter candidate.

Abstract

We investigate the collider phenomenology of the standard Hierarchical VEVs Model by proposing a new version, which avoids large flavor changing neutral current interactions, thus, rendering the scale of new physics as low as the electroweak scale. The resulting collider signatures are distinctive and testable at the High-Luminosity LHC, the High-Energy LHC, and future 100\,TeV hadron colliders. Remarkably, one of the pseudoscalars in the model can account for the 95.4\,GeV di-photon excess observed by ATLAS and CMS. In addition, the model naturally accommodates a new class of neutrino-philic dark matter candidate, \emph{neutrinic dark matter}, that interacts exclusively with neutrino pairs.