DarkSUSY 6.3: Freeze-in, out-of-equilibrium freeze-out, cosmic-ray upscattering and further new features

TL;DR

DarkSUSY 6.3 introduces new features for calculating dark matter relic density via freeze-in, models with secluded sectors, cosmic-ray upscattering effects, and updated spectra for indirect detection, enhancing its versatility for dark matter research.

Contribution

The paper presents significant new code features in DarkSUSY 6.3, including calculations for freeze-in, out-of-equilibrium freeze-out, cosmic-ray upscattering, and updated spectra for indirect detection.

Findings

Enabled relic density computation for feebly interacting particles via freeze-in.

Implemented cosmic-ray upscattering effects in direct detection calculations.

Provided updated gamma-ray, neutrino, and cosmic-ray spectra based on extensive Pythia 8 simulations.

Abstract

DarkSUSY is a versatile tool for precision calculations of a large variety of dark matter-related signals, ranging from predictions for the dark matter relic density to dark matter self-interactions and rates relevant for direct and indirect detection experiments. In all of these areas significant new code additions have been made in recent years, since the release of DarkSUSY 6 in 2018, which we summarize in this overview. In particular, DarkSUSY now allows users to compute the relic density for feebly interacting massive particles via the freeze-in mechanism, but also offers new routines for freeze-out calculations in the presence of secluded dark sectors as well as for models where kinetic equilibrium is not fully established during the freeze-out process. On the direct detection side, the effect of cosmic-ray upscattering of dark matter has been fully implemented, leading to a subdominant relativistic component in the expected dark matter flux at Earth. Finally, updated yields relevant for indirect searches with gamma rays, neutrinos or charged cosmic rays have been added; the new default spectra are based on a large number of Pythia 8 runs, but users can also easily switch between various alternative spectra. Further code details, including a manual and various concrete example applications, are provided at www.darksusy.org.