Abstract
A search for muon neutrinos originating from dark matter annihilations in the Sun is performed using the data recorded by the ANTARES neutrino telescope from 2007 to 2012. In order to obtain the best possible sensitivities to dark matter signals, an optimisation of the event selection criteria is performed taking into account the background of atmospheric muons, atmospheric neutrinos and the energy spectra of the expected neutrino signals. No significant excess over the background is observed and $90\%$ C.L. upper limits on the neutrino flux, the spin--dependent and spin--independent WIMP-nucleon cross--sections are derived for WIMP masses ranging from $ \rm 50$ GeV to $\rm 5$ TeV for the annihilation channels $\rm WIMP + WIMP \to b \bar b, W^+ W^-$ and $\rm \tau^+ \tau^-$.
Highlights
A number of independent observations in cosmology and astrophysics point to the existence of large amounts of non-baryonic matter in the Universe [1,2]
A search for muon neutrinos originating from dark matter annihilations in the Sun is performed using the data recorded by the ANTARES neutrino telescope from 2007 to 2012
An indirect search for neutrinos coming from weakly interacting massive particles (WIMPs) annihilations in the Sun is presented, using data recorded by the ANTARES neutrino telescope from 2007 to 2012
Summary
A number of independent observations in cosmology and astrophysics point to the existence of large amounts of non-baryonic matter in the Universe [1,2]. In the case of the minimal supersymmetric extension of the Standard Model (MSSM), the lightest new particle is stable due to the conservation of a quantum number, the R-parity, that prevents its decay to ordinary particles [3] If this lightest supersymmetric particle is electromagnetically neutral, it is a natural WIMP candidate for dark matter. WIMPs tend to accumulate in celestial objects due to scattering with ordinary matter and the gravitation pull of these objects This is why indirect searches for dark matter concentrate on massive astrophysical bodies such as the Earth, the centre of our Galaxy, galaxy clusters or, as in this case, the Sun. In this letter, an indirect search for neutrinos coming from WIMP annihilations in the Sun is presented, using data recorded by the ANTARES neutrino telescope from 2007 to 2012. Sensitivities to the signal neutrino flux, ν , and the spin-dependent and spin-independent WIMP-nucleon cross-sections, σSpD and σSI, are derived using three different annihilation channels
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