Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-06-29
Phys.Rev. D49 (1994) 636-647
Physics
High Energy Physics
High Energy Physics - Phenomenology
32 pages, requires harvmac.tex with 7 EPS figures (tarred-compressed-uuencoded submitted separately) complete postscript file
Scientific paper
10.1103/PhysRevD.49.636
We present a complete calculation of the cross section for neutralino annihilation into the two-gluon final state. This channel can be quite important for the phenomenology of neutralino annihilation due to the well-known helicity suppression of neutralino annihilation into light quarks and leptons. In addition, we calculate the cross section for annihilation of neutralinos into a gluon and quark-antiquark pair, and discuss QCD corrections to the tree-level cross sections for neutralino annihilation into quarks. If the neutralino is lighter than the top quark, the effect of these results on high-energy neutrino signals from neutralino annihilation in the Sun and in the Earth can be significant, especially if the neutralino is primarily gaugino. On the other hand, our results should have little effect on calculations of the cosmological abundance of neutralinos. We also briefly discuss implications for cosmic-ray antiprotons from neutralino annihilation in the galactic halo.
Drees Manuel
Jungman Gerard
Kamionkowski Marc
Nojiri Mihoko M.
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