Effect of Gravitational Focusing on Annual Modulation in Dark-Matter Direct-Detection Experiments
arXiv:1308.1953 · doi:10.1103/PhysRevLett.112.011301
Abstract
The scattering rate at dark-matter direct-detection experiments should modulate annually due to the Earth's orbit around the Sun. The rate is typically thought to be extremized around June 1, when the relative velocity of the Earth with respect to the dark-matter wind is maximal. We point out that gravitational focusing can alter this modulation phase. Unbound dark-matter particles are focused by the Sun's gravitational potential, affecting their phase-space density in the lab frame. Gravitational focusing can result in a significant overall shift in the annual-modulation phase, which is most relevant for dark matter with low scattering speeds. The induced phase shift for light O(10) GeV dark matter may also be significant, depending on the threshold energy of the experiment.
4 pages, 3 figures; v2, minor improvements, PRL version
References in corpus (9)
- The RAVE Survey: Constraining the Local Galactic Escape Speed
- Thin, thick and dark discs in LCDM
- Constraints on Low-Mass WIMP Interactions on 19F from PICASSO
- The Dark Matter at the End of the Galaxy
- Detecting the Milky Way's Dark Disk
- Dark matter in the solar system I: The distribution function of WIMPs at the Earth from solar capture
- Dark-Matter Harmonics Beyond Annual Modulation
- Phase-space distribution of unbound dark matter near the Sun
- Dark matter in the solar system III: The distribution function of WIMPs at the Earth from gravitational capture
Cited by in corpus (59)
- Mirror dark matter: Cosmology, galaxy structure and direct detection
- Scalar Simplified Models for Dark Matter
- A review of the discovery reach of directional Dark Matter detection
- Dark matter, dark energy, and alternate models: A review
- Revealing the Dark Matter Halo with Axion Direct Detection
- Modulation Effects in Dark Matter-Electron Scattering Experiments
- The SABRE project and the SABRE PoP
- Inferred Evidence For Dark Matter Kinematic Substructure with SDSS-Gaia
- Searches for light dark matter using condensed matter systems
- Direct Detection Signatures of Self-Interacting Dark Matter with a Light Mediator
- Signatures of Earth-scattering in the direct detection of Dark Matter
- The Earth's velocity for direct detection experiments
- Dark Shards: velocity substructure from Gaia and direct searches for dark matter
- A Dark Matter Interpretation of Excesses in Multiple Direct Detection Experiments
- Dark-Matter Harmonics Beyond Annual Modulation
- Annual Modulation in Direct Dark Matter Searches
- Directional axion detection
- Dark Matter, Destroyer of Worlds: Neutrino, Thermal, and Existential Signatures from Black Holes in the Sun and Earth
- First data from DM-Ice17
- On the direct detection of multi-component dark matter: sensitivity studies and parameter estimation
- Model-independent comparison of annual modulation and total rate with direct detection experiments
- The highest-speed local dark matter particles come from the Large Magellanic Cloud
- Directional detection of dark matter streams
- Decoherence as a way to measure extremely soft collisions with dark matter
- Dark Matter vs. Neutrinos: The effect of astrophysical uncertainties and timing information on the neutrino floor
- DAMA/LIBRA-phase2 in WIMP effective models
- Gravitational Focusing of Wave Dark Matter
- Dark Photons in the Solar Basin
- Gravitational focusing of Imperfect Dark Matter
- Annual Modulation of Cosmic Relic Neutrinos
- On the direct detection of multi-component dark matter: implications of the relic abundance
- Electron scattering of light new particles from evaporating primordial black holes
- Time-dependent rate of multicomponent dark matter: Reproducing the DAMA/LIBRA phase-2 results
- A Quantum Description of Wave Dark Matter
- Towards Resolving the Gallium Anomaly
- Measuring Anisotropies in the Cosmic Neutrino Background
- Light weakly interacting massive particles
- SABRE: WIMP modulation detection in the northern and southern hemisphere
- Is the effect of the Sun's gravitational potential on dark matter particles observable?
- Prospects for detection of target-dependent annual modulation in direct dark matter searches
- Target dependence of the annual modulation in direct dark matter searches
- Gravitational focusing effects on streaming dark matter as a new detection concept
- Inelastic dark matter with spin-dependent couplings to protons and large modulation fractions in DAMA
- Axion Quark Nugget Dark Matter: Time Modulations and Amplifications
- Daily modulation and gravitational focusing in direct dark matter search experiments
- Anapole Dark Matter after DAMA/LIBRA-phase2
- Harmonics in the Dark-Matter Sky: Directional Detection in the Fourier-Bessel Basis
- Pulse-shape discrimination between electron and nuclear recoils in a NaI(Tl) crystal
- COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models
- Gravitational Focusing and Substructure Effects on the Rate Modulation in Direct Dark Matter Searches
- Prospects for Distinguishing Dark Matter Models Using Annual Modulation
- Strongly interacting dark matter and the DAMA signal
- Gusts in the Headwind: Uncertainties in Direct Dark Matter Detection
- Dark Matter Velocity Distributions for Direct Detection: Astrophysical Uncertainties are Smaller Than They Appear
- Monthly Modulation in Dark Matter Direct-Detection Experiments
- Orbital Dynamics of the Solar Basin
- Numerical treatment of annual modulation of relic neutrinos
- Gravitational Focusing of Low-Velocity Dark Matter on the Earth's Surface
- Prospects for Dark Matter signal discovery and model selection via timing information in a low-threshold experiment