A halo-independent lower bound on the dark matter capture rate in the Sun from a direct detection signal
- Department of Theoretical physics, School of Engineering Sciences,KTH Royal Institute of Technology,AlbaNova University Center, 106 91 Stockholm (Sweden)
- Oskar Klein Centre for Cosmoparticle Physics, Department of Physics,Stockholm University,SE-10691 Stockholm (Sweden)
We show that a positive signal in a dark matter (DM) direct detection experiment can be used to place a lower bound on the DM capture rate in the Sun, independent of the DM halo. For a given particle physics model and DM mass we obtain a lower bound on the capture rate independent of the local DM density, velocity distribution, galactic escape velocity, as well as the scattering cross section. We illustrate this lower bound on the capture rate by assuming that upcoming direct detection experiments will soon obtain a significant signal. When comparing the lower bound on the capture rate with limits on the high-energy neutrino flux from the Sun from neutrino telescopes, we can place upper limits on the branching fraction of DM annihilation channels leading to neutrinos. With current data from IceCube and Super-Kamiokande non-trivial limits can be obtained for spin-dependent interactions and direct annihilations into neutrinos. In some cases also annihilations into ττ or bb start getting constrained. For spin-independent interactions current constraints are weak, but they may become interesting for data from future neutrino telescopes.
- Sponsoring Organization:
- SCOAP3, CERN, Geneva (Switzerland)
- OSTI ID:
- 22454550
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 05; Other Information: PUBLISHER-ID: JCAP05(2015)036; OAI: oai:repo.scoap3.org:10397; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Neutrino constraints on inelastic dark matter after CDMS II results
Dark matter in the Solar System. I. The distribution function of WIMPs at the Earth from solar capture