Indirect detection of dark matter weakly interacting massive particles in a liquid argon time projection chamber

We assess the prospects for indirect detection of weakly interacting massive particles using a large liquid argon TPC detector. Signal events will consist of energetic electron (anti) neutrinos coming from the decay of tau leptons and b quarks produced in WIMP annihilation in the core of the Sun. Background contamination from atmospheric neutrinos is expected to be low, thanks to the superb angular resolution and particle identification capabilities provided by the experimental set-up considered. We evaluate the event rates predicted for an annihilating WIMP as a function of its elastic scattering cross section for nucleons. This technique is particularly useful for WIMPs lighter than similar to100 GeV.