Three-body annihilation of neutralinos below two-body thresholds

1998/05/31 by Xuelei Chen, Marc Kamionkowski · 4 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #astro-ph #hep-ex #hep-ph

paper · pdf · doi:10.1088/1126-6708/1998/07/001

published as JHEP 9807 (1998) 001 · 19 pages, 8 postscript figures, use JHEP.cls

openalex publication_date 1998/07/07 · arxiv created 1998/08/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We calculate the cross section for s-wave neutralino annihilation to three-body final states below the W⁺ W^- and t-bar t thresholds. Such three-body channels may dominate the annihilation cross section if the neutralino mass is not too much less than m_t and m_W respectively. Furthermore, because neutrinos produced in these channels are much more energetic than those from the bb or tau⁺ tau^- channels, they can dominate the energetic-neutrino fluxes from neutralino annihilation in the Sun or Earth far below these thresholds and significantly enhance the neutrino signal in certain regions of the supersymmetric parameter space.

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