Warm Surprises from Cold Duets: N-Body Simulations with Two-Component Dark Matter

TL;DR

This study uses N-body simulations to investigate two-component cold dark matter, revealing that mass differences and annihilation processes can produce warm dark matter-like effects, aligning with observations and guiding experimental searches.

Contribution

It introduces a novel two-component dark matter model demonstrating warm dark matter behavior without observational constraints, supported by extensive simulations.

Findings

Two-component dark matter can mimic warm dark matter effects.

Mass differences and annihilation lead to warm-like behavior.

Model aligns with observational data and informs experimental searches.

Abstract

We explore extensive N-body simulations with two-component cold dark matter candidates. We delve into the temperature evolution, power spectrum, density perturbation, and maximum circular velocity functions. We find that the substantial mass difference between the two candidates and the annihilation of the heavier components to the lighter ones effectively endow the latter with warm dark matter-like behavior, taking advantage of all distinct features that warm dark matter candidates offer, without observational bounds on the warm dark matter mass. Moreover, we demonstrate that the two-component dark matter model aligns well with observational data, providing valuable insights into where and how to search for the elusive dark matter candidates in terrestrial experiments.