Neutrino Signals from Solar Neutralino Annihilations in Anomaly Mediated Supersymmetry Breaking Model
arXiv:0803.2164 · doi:10.1103/PhysRevD.77.115014
Abstract
The lightest neutralino, as the dark matter candidate, can be gravitationally captured by the Sun. In this paper, we studied the high energy neutrino signals from solar neutralino annihilations in the core of the Sun in the anomaly mediated supersymmetry (SUSY) breaking (AMSB) model. Based on the event-by-event monte carlo simulation code WimpSim, we studied the detailed energy and angular spectrum of the final muons at large neutrino telescope IceCube. More precisely we simulated the processes since the production of neutrino via neutralino annihilation in the core of the Sun, neutrino propagation from the Sun to the Earth, as well as the converting processes from neutrino to muon. Our results showed that in the AMSB model it is possible to observe the energetic muons at IceCube, provided that the lightest neutralio has relatively large higgsino component, as a rule of thumb or equivalently . Especially, for our favorable parameters the signal annual events can reach 102 and the statistical significance can reach more than 20. We pointed out that the energy spectrum of muons may be used to distinguish among the AMSB model and other SUSY breaking scenarios.
arXiv comment26 pages, 11 figures;V2 references added;V3 value of m_t,g-2(muon),b->sgamma updated;V4 version to appear in PRD, a typo corrected
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