DarkSUSY 6: an advanced tool to compute dark matter properties numerically

Abstract

DarkSUSY: computing supersymmetric dark matter properties numerically P Gondolo, J Edsjö, P Ullio et al. Abstract. The nature of dark matter remains one of the key science questions. WeaklyInteracting Massive Particles (WIMPs) are among the best motivated particle physics candidates, allowing to explain the measured dark matter density by employing standard big-bang thermodynamics. Examples include the lightest supersymmetric particle, though many alternative particles have been suggested as a solution to the dark matter puzzle. We introduce here a radically new version of the widely used DarkSUSY package, which allows to compute the properties of such dark matter particles numerically. With DarkSUSY 6 one can accurately predict a large variety of astrophysical signals from dark matter, such as direct detection rates in low-background counting experiments and indirect detection signals through antiprotons, antideuterons, gamma rays and positrons from the Galactic halo, or high-energy neutrinos from the center of the Earth or of the Sun. For thermally produced dark matter like WIMPs, high-precision tools are provided for the computation of the relic density in the Universe today, as well as for the size of the smallest dark matter protohalos. Furthermore, the code allows to calculate dark matter self-interaction rates, which may affect the distribution of dark matter at small cosmological scales. Compared to earlier versions, JCAP07(2018)033DarkSUSY 6 introduces many significant physics improvements and extensions. The most fundamental new feature of this release, however, is that the code has been completely reorganized and brought into a highly modular and flexible shape. Switching between different pre-implemented dark matter candidates has thus become straight-forward, just as adding new -WIMP or non-WIMP -particle models or replacing any given functionality in a fully user-specified way. In this article, we describe the physics behind the computer package, along with the main structure and philosophy of this major revision of DarkSUSY. A detailed manual is provided together with the public release at www.darksusy.org.

Direct detection and complementary constraints for sub-GeV dark matter

“…This makes it straightforward to translate direct detection limits reported in the literature for heavy DM, assuming the standard DM halo profile and velocity distribution, to a maximal count rate in the analysis window of recoil energies and in turn to limits resulting from the CRDM component discussed here [28]. The updated routines for the computation of the resulting CRDM flux and underground scattering rates have been implemented in DarkSUSY [88], which we also use to calculate the resulting limits from a corresponding re-interpretation of Xenon-1T [26] results.…”

Search for dark matter cosmic-ray electrons and positrons from the Sun with the Fermi Large Area Telescope

“…Hence we are effectively integrating all of the emission, so that the box-shaped spectrum is a valid assumption. The capture rate has been evaluated with the DARKSUSY code version 6.1.0 [30][31][32] assuming the default settings, with a local DM density ρ = 0.3 GeV/cm 3 , a Maxwellian velocity distribution with average velocity v = 220 km/s and velocity dispersion v rms = 270 km/s, and setting the DM-nucleon cross section to σ = 10 −40 cm 2 (in both the spin independent and spin dependent cases).…”

GAMBIT and its application in the search for physics Beyond the Standard Model

“…The GAMBIT build system allows users to select and automatically download, configure and build whatever combination of backends they prefer to use, and the dependency resolver automatically adapts to the presence or absence of different backends when selecting which functions to connect to others. Backends presently supported in version 1.4.2 of GAMBIT are Capt'n General [112], DarkSUSY [118,119], DDCalc [112,120], FeynHiggs [121][122][123][124][125], gamLike [120], GM2Calc [126], HiggsBounds [127][128][129], HiggsSignals [130], micrOMEGAs [131][132][133][134][135][136][137], nulike [18,41], Pythia [138,139], SPheno [140,141], SuperIso [115][116][117], SUSYHD [142] and SUSY-HIT [143]. Many more are also already supported in the current development version, which will be released in 2020.…”

“…Finally, the relic density of dark matter can be computed via interfaces to DarkSUSY and micrOMEGAs [119,169], and used to constrain models by computing a likelihood based on the value observed by Planck [170]. The basic structure of DarkBit applicable to WIMP theories is sketched in Fig.…”