2010/01/07 by Jing Shu, Peng‐Fei Yin, Peng-fei Yin +1 · 25 citations
Physics and Astronomy · #Annihilation #Astronomy #Bar (unit) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Inelastic scattering #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Scattering #Sigma #Spin (aerodynamics) #hep-ph
paper · pdf · doi:10.1103/physrevd.81.123519
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 81(12) (American Physical Society) · 11 pages, 8 figures
arxiv created 2010/01/07 · openalex publication_date 2010/06/16 · arxiv updated 2014/11/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss the neutrino constraints from solar and terrestrial dark matter (DM) annihilations in the inelastic dark matter (iDM) scenario after the recent CDMS II results. To reconcile the DAMA/LIBRA data with constraints from all other direct experiments, the iDM needs to be light (m_\ensuremathχ<100 GeV) and have a large DM-nucleon cross section (\ensuremathσn\ensuremath∼10^\ensuremath-4 pb in the spin-independent (SI) scattering and \ensuremathσn\ensuremath∼10 pb in the spin-dependent (SD) scattering). The dominant contribution to the iDM capture in the Sun is from scattering off Fe/Al in the SI/SD case. Current bounds from Super-Kamiokande exclude the hard DM annihilation channels, such as W+W^\ensuremath-, ZZ, tt, and \ensuremathτ+\ensuremathτ^\ensuremath-. For soft channels such as bb and cc, the limits are loose, but could be tested or further constrained by future IceCube plus DeepCore. For neutrino constraints from the DM annihilation in the Earth, due to the weaker gravitational effect of the Earth and inelastic capture condition, the constraint exists only for small mass splitting \ensuremathδ<40 keV and m_\ensuremathχ\ensuremath∼(10,50) GeV even in the \ensuremathτ+\ensuremathτ^\ensuremath- channel.