Halo-independent bounds on Inelastic Dark Matter

Abstract

We discuss halo-independent constraints on the Inelastic Dark Matter (IDM) scenario, in which a Weakly Interaction Massive Particle (WIMP) state $\chi$ with mass $m_{\chi }$ interacts with nuclear targets by upscattering to a heavier state ${\chi }^{\prime }$ with mass $m_{\chi }+\delta$. In order to do so we adopt the single-stream method, that exploits the complementarity of Direct Detection (DD) and Capture in the Sun to extend the experimental sensitivity to the full range of incoming WIMP speeds. We show that a non-vanishing mass splitting $\delta$ modifies such range, and that for particular combinations of $m_{\chi }$ and $\delta$ the complementarity between the two detection techniques required by the method is lost. Specifically, assuming for the escape velocity in our Galaxy $u_{esc}$ the reference value $u_{esc}^{ref}$ = 560 km/s a halo-independent bound is possible when $\delta \lesssim$ 510 keV for a Spin-Independent interaction and when $\delta \lesssim$ 245 keV for a Spin-Dependent interaction (with the Spin-Independent value slightly reduced to $\delta \lesssim$ 490 keV when $u_{esc}>u_{esc}^{ref}$). In the low-mass regime the bound from capture in the Sun is always more constraining than that for DD and is sufficient alone to provide a halo-independent constraint, while for large WIMP masses the halo-independent bound is given by a combination of capture in the Sun and DD. We also find that, for $u_{esc}$ = $u_{esc}^{ref}$, unless the mass of the target used in DD is larger than about four times that of the target driving capture in the Sun, DD does not play any role in the determination of the maximal value of $\delta$ for which a halo-independent bound is possible. We also discuss the issue of thermalization of IDM within the Sun and show that its impact on our results is mild.

arXiv comment32 pages and 11 figures. Discussion on thermalization added. Updated to published version

References in corpus (65)

• Supersymmetric Dark Matter
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• The merger that led to the formation of the Milky Way's inner stellar halo and thick disk
• Co-formation of the Galactic disc and the stellar halo
• Inelastic Dark Matter
• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• The RAVE Survey: Constraining the Local Galactic Escape Speed
• The Effective Field Theory of Dark Matter Direct Detection
• Direct Detection of WIMP Dark Matter: Concepts and Status
• New Solar Composition: The Problem With Solar Models Revisited
• Model-independent WIMP Scattering Responses and Event Rates: A Mathematica Package for Experimental Analysis
• Dark Matter Search Results from the Complete Exposure of the PICO-60 C${}_3$F${}_8$ Bubble Chamber
• The RAVE survey: the Galactic escape speed and the mass of the Milky Way
• The Sausage Globular Clusters
• First model independent results from DAMA/LIBRA-phase2
• Search for annihilating dark matter in the Sun with 3 years of IceCube data
• Integrating Out Astrophysical Uncertainties
• Dark Matter Search Results from the PICO-60 CF${}_3$I Bubble Chamber
• Characterization and history of the Helmi streams with Gaia DR2
• Resolving astrophysical uncertainties in dark matter direct detection
• Exothermic Dark Matter
• Heating up Neutron Stars with Inelastic Dark Matter
• Form factors for dark matter capture by the Sun in effective theories
• Astrophysical uncertainties on direct detection experiments
• Inferred Evidence For Dark Matter Kinematic Substructure with SDSS-Gaia
• Interpreting Dark Matter Direct Detection Independently of the Local Velocity and Density Distribution
• Neutrinos From Particle Decay in the Sun and Earth
• Astrophysics independent bounds on the annual modulation of dark matter signals
• Direct Detection Signals from Absorption of Fermionic Dark Matter
• Generalized Halo Independent Comparison of Direct Dark Matter Detection Data
• Halo-independent methods for inelastic dark matter scattering
• New Sensitivity to Solar WIMP Annihilation using Low-Energy Neutrinos
• A novel way of constraining WIMPs annihilations in the Sun: MeV neutrinos
• Dark Shards: velocity substructure from Gaia and direct searches for dark matter
• A new halo-independent approach to dark matter direct detection analysis
• Capture of Inelastic Dark Matter in the Sun
• Taking Halo-Independent Dark Matter Methods Out of the Bin
• Search for GeV-scale Dark Matter Annihilation in the Sun with IceCube DeepCore
• Capture and Indirect Detection of Inelastic Dark Matter
• Bounds on Long-lived Dark Matter Mediators from Neutron Stars
• Quantifying (dis)agreement between direct detection experiments in a halo-independent way
• Constraints on dark matter-nucleon effective couplings in the presence of kinematically distinct halo substructures using the DEAP-3600 detector
• Chasing Accreted Structures within Gaia DR2 using Deep Learning
• Electroweakly-Interacting Dirac Dark Matter
• A systematic halo-independent analysis of direct detection data within the framework of Inelastic Dark Matter
• Studying generalised dark matter interactions with extended halo-independent methods
• What is the probability that direct detection experiments have observed Dark Matter?
• The dark matter component of the Gaia radially anisotropic substructure
• Capture of Electroweak Multiplet Dark Matter in Neutron Stars
• A novel approach to derive halo-independent limits on dark matter properties
• Bracketing the impact of astrophysical uncertainties on local dark matter searches
• Probing WIMP particle physics and astrophysics with direct detection and neutrino telescope data
• Halo-Independent Direct Detection Analyses Without Mass Assumptions
• Halo-independent determination of the unmodulated WIMP signal in DAMA: the isotropic case
• Neutrino Constraints on Inelastic Dark Matter after CDMS II
• Predicting the dark matter velocity distribution in galactic structures: tests against hydrodynamic cosmological simulations
• Limits on Dark Matter Effective Field Theory Parameters with CRESST-II
• Halo-independent comparison of direct detection experiments in the effective theory of dark matter-nucleon interactions
• The distribution of inelastic dark matter in the Sun
• New constraints on inelastic dark matter from IceCube
• Towards a more rigorous treatment of uncertainties on the velocity distribution of dark matter particles for capture in stars
• Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO
• Halo-independent bounds on the non-relativistic effective theory of WIMP-nucleon scattering from direct detection and neutrino observations
• A halo-independent lower bound on the dark matter capture rate in the Sun from a direct detection signal

Cited by in corpus (4)

• Low-mass constraints on WIMP effective models of inelastic scattering using the Migdal effect
• Sensitivity of WIMP bounds on the velocity distribution in the limit of a massless mediator
• Information divergences to parametrize astrophysical uncertainties in dark matter direct detection
• Information-theoretic astrophysical uncertainties in the effective theory of dark matter direct detection