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Published February 15, 1997 | Published
Journal Article Open

Indirect detection of a light Higgsino motivated by collider data


Kane and Wells recently argued that collider data point to a Higgsino-like lightest supersymmetric partner which would explain the dark matter in our Galactic halo. They discuss direct detection of such dark-matter particles in laboratory detectors. Here, we argue that such a particle, if it is indeed the dark matter, might alternatively be accessible in experiments which search for energetic neutrinos from dark-matter annihilation in the Sun. We provide accurate analytic estimates for the rates which take into account all relevant physical effects. Currently, the predicted signal falls roughly one to three orders of magnitude below experimental bounds, depending on the mass and coupling of the particle; however, detectors such as MACRO, super-Kamiokande, and AMANDA will continue to take data and should be able to rule out or confirm an interesting portion of the possible mass range for such a dark-matter particle within the next five years.

Additional Information

© 1997 The American Physical Society Received 16 September 1996 We would like to thank D. Akerib, E. Diehl, R. Gaitskell, G. Kane, C. Kolda, and G. Tarle for helpful discussions. M.K. thanks the Theory Division at CERN for hospitality, and M.K. and K.F. thank the Fermilab Theoretical Astrophysics Center (where part of this work was completed) for hospitality. This work was supported at Columbia by the U.S. DOE under Contract No. DEFG02-92-ER 40699, NASA under Grant No. NAG5-3091, the Alfred P. Sloan Foundation, and at Michigan by Grant No. NSF-PHY9407194. Portions of this work (K.F.) were completed at the Aspen Center for Physics.

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