On the importance of direct detection combined limits for spin independent and spin dependent dark matter interactions

Abstract

In this work we show how the inclusion of dark matter (DM) direct detection upper bounds in a theoretically consistent manner can affect the allowed parameter space of a DM model. Traditionally, the limits from DM direct detection experiments on the elastic scattering cross section of DM particles as a function of their mass are extracted under simplifying assumptions. Relaxing the assumptions related to the DM particle nature, such as the neutron to proton ratio of the interactions, or the possibility of having similar contributions from the spin independent (SI) and spin dependent (SD) interactions can vary significantly the upper limits. Furthermore, it is known that astrophysical and nuclear uncertainties can also affect the upper bounds. To exemplify the impact of properly including all these factors, we have analysed two well motivated and popular DM scenarios: neutralinos in the NMSSM and a Z' portal with Dirac DM. We have found that the allowed parameter space of these models is subject to important variations when one includes both the SI and SD interactions at the same time, realistic neutron to proton ratios, as well as using different self-consistent speed distributions corresponding to popular DM halo density profiles, and distinct SD structure functions. Finally, we provide all the necessary information to include the upper bounds of SuperCDMS and LUX taking into account all these subtleties in the investigation of any particle physics model. The data for each experiment and example codes are available at this site http://goo.gl/1CDFYi, and their use is detailed in the appendices of this work.

38 pages, 10 figures, 2 appendices. Minor text corrections. References added

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Cited by in corpus (8)

• Augury of Darkness: The Low-Mass Dark Z' Portal
• Direct Detection of Dark Matter -- APPEC Committee Report
• SUSY-QCD corrections for the direct detection of neutralino dark matter and correlations with the relic density
• Phenomenology of NMSSM in TeV scale mirage mediation
• How to calculate dark matter direct detection exclusion limits that are consistent with gamma rays from annihilation in the Milky Way halo
• Enhanced lines and box-shaped features in the gamma-ray spectrum from annihilating dark matter in the NMSSM
• Spin-$0^{\pm }$ portal induced Dark Matter
• Nuclear response to dark matter signals in Ge and Xe odd-mass targets