The annihilation of Weakly Interactive Massive Particles ( WIMP ) in the centre of the sun could give rise to neutrino fluxes .
We study the prospects of searching for these neutrinos at the upcoming Iron CALorimeter ( ICAL ) detector to be housed at the India-based Neutrino Observatory ( INO ) .
We perform ICAL simulations to obtain the detector efficiencies and resolutions in order to simulate muon events in ICAL due to neutrinos coming from annihilation of WIMP in the mass range m _ { \chi } = ( 3 - 100 ) GeV .
The atmospheric neutrinos pose a major background for these indirect detection studies and can be reduced using the fact that the signal comes only from the direction of the sun .
For a given WIMP mass , we find the opening angle \theta _ { 90 } such that 90 % of the signal events are contained within this angle and use this cone-cut criteria to reduce the atmospheric neutrino background .
The reduced background is then weighted by the solar exposure function at INO to obtain the final background spectrum for a given WIMP mass .
We perform a \chi ^ { 2 } analysis and present expected exclusion regions in the \sigma _ { SD } - m _ { \chi } and \sigma _ { SI } - m _ { \chi } , where \sigma _ { SD } and \sigma _ { SI } are the WIMP-nucleon Spin-Dependent ( SD ) and Spin-Independent ( SI ) scattering cross-section , respectively .
For a 10 years exposure and m _ { \chi } = 25 GeV , the expected 90 % C.L .
exclusion limit is found to be \sigma _ { SD } < 6.87 \times 10 ^ { -41 } cm ^ { 2 } and \sigma _ { SI } < 7.75 \times 10 ^ { -43 } cm ^ { 2 } for the \tau ^ { + } \tau ^ { - } annihilation channel and \sigma _ { SD } < 1.14 \times 10 ^ { -39 } cm ^ { 2 } and \sigma _ { SI } < 1.30 \times 10 ^ { -41 } cm ^ { 2 } for the b~ { } \bar { b } channel , assuming 100 % branching ratio for each of the WIMP annihilation channel .