Indirect Searches for Dark Matter Signatures at INO

Neutrino fluxes could arise due to annihilation of Weakly Interactive Massive Particles (WIMPs) in the center of the sun. We study the prospects of search for muon events due to such neutrinos at the upcoming Iron CALorimeter (ICAL) detector to be housed at India-based Neutrino Observatory (INO). Although the atmospheric neutrinos will pose a serious background to the signal neutrinos produced through WIMP annihilation, the former could be supressed significantly by using the directional property of signal neutrinos. For 50kt×10 years of ICAL running and WIMP masses (m_χ) between 3-100 GeV, we perform a χ² analysis and present expected exclusion regions in the σ_βख़ — m_x and σ_βι — m_x plane, where σ_βख़ and σ_βι are the WIMP-nucleon Spin-Dependent (SD) and Spin-Independent (SI) scattering cross-sections, respectively. For m_x = 25 GeV, the expected 90 % C.L. exclusion limit on σ_βख़ are σβॄ < 7.82 x 10⁻⁴¹ cm² for τ+τ⁻ channel and σ_βख़ < 1.23 10⁻³⁹ cm² for 66 channel. For same m_×, the expected 90 % C.L. exclusion limits on σ_βι are σβι < 8.97 × 10⁻⁴³ cm² for τ +τ⁻ channel and σβι < 1.43×10⁻⁴¹ cm² for 66 channel.