# Dark Matter and The Seesaw Scale

## TL;DR

This paper explores how cosmological dark matter constraints can set an upper limit on the seesaw scale, linking neutrino mass origins with dark matter properties and collider signatures.

## Contribution

It introduces a simple model connecting the seesaw scale to dark matter relic density, deriving an upper bound on lepton number violation scale from cosmological data.

## Key findings

- Upper bound of multi-TeV on the seesaw scale
- Predictions for dark matter detection experiments
- Potential signatures at the Large Hadron Collider

## Abstract

We discuss the possibility to find an upper bound on the seesaw scale using the cosmological bound on the cold dark matter relic density. We investigate a simple relation between the origin of neutrino masses and the properties of a dark matter candidate in a simple theory where the new symmetry breaking scale defines the seesaw scale. Imposing the cosmological bounds, we find an upper bound of order multi-TeV on the lepton number violation scale. We investigate the predictions for direct and indirect detection dark matter experiments, and the possible signatures at the Large Hadron Collider.