Non-metricity signatures on the Higgs boson signal strengths at the LHC

TL;DR

This paper investigates how non-metricity, a feature of alternative gravity theories, affects Higgs boson signals at the LHC, providing new constraints and insights into quantum gravity effects through high-energy collider data.

Contribution

It introduces a novel analysis of non-metricity effects on Higgs processes at the LHC using effective field theory, linking gravitational modifications to collider phenomenology.

Findings

Derived constraints on non-metricity scale from Higgs decay and production processes.

Established correlations between non-metricity parameters and collider observables.

Demonstrated the potential of high-energy experiments to probe gravitational effects beyond astronomy.

Abstract

In this work we study the high-energy Higgs boson phenomenology associated to the non-metricity scale $\Lambda_Q$ at the LHC. Non-metricity is present in more generic non-Riemannian geometries describing gravity beyond General Relativity and exhibits nice features in astronomy and cosmology, and it can be analysed perturbatively. Using effective field theory tools, we calculate the new physics contributions to the one-loop $H\to\gamma\gamma$ and $gg\to H$ processes and, together with previous bounds from Compton scattering, we obtain relevant constraints and correlations in the model's parameter space. This can help us take a step further, and no longer associate gravitational effects uniquely to astronomical phenomena, and to start analysing these effects by means of high energy experiments. In turn, this could also help us get a better grasp at quantum phenomena associated to gravity.