Limits on the Weyl meson parameters due to Fermi-LAT gamma-ray observations

TL;DR

This paper uses Fermi-LAT gamma-ray data to set constraints on the properties of Weyl mesons, hypothetical particles that could serve as dark matter candidates in scale-invariant theories.

Contribution

It provides the first observational limits on Weyl meson parameters based on gamma-ray data, linking theoretical models to astrophysical observations.

Findings

Fermi-LAT data imposes strong constraints on Weyl meson decay and annihilation rates.

Weyl meson parameters are significantly limited by gamma-ray observations.

The results restrict the viability of Weyl mesons as dark matter candidates.

Abstract

We use gamma-ray observations by the Fermi Large Area Telescope (Fermi-LAT) to impose limits on the properties of the hypothetical particle Weyl meson. Such mesons arise in theories which display local scale invariance and act as dark matter candidate. In a generalized locally scale invariant Standard Model it can decay or annihilate to the photon pair through the Higgs channel. We find that Fermi-LAT observations severely constrain the parameters of the Weyl meson.