منابع مشابه
Neutralino annihilation into gluons.
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 qua...
متن کاملCosmic-ray antiprotons from neutralino annihilation into gluons.
We estimate the ux of cosmic-ray antiprotons expected from the annihilation of neutralinos in the galactic halo. The antiproton signal may ooer an important alternative detection scheme in the case that neutralino annihilation proceeds mainly to the two-gluon nal state.
متن کاملNeutralino Annihilation into Two Photons
We compute the annihilation cross-section of two neutralinos at rest into two photons, which is of importance for the indirect detection of neutralino dark matter in the galactic halo through a quasi-monochromatic gamma-ray line. We include all diagrams to one-loop level in the minimal supersymmetric extension of the standard model. We use the helicity formalism, the backgroundfield gauge, and ...
متن کاملHeavy Wino-like Neutralino Dark Matter Annihilation into Antiparticles
The lightest neutralino is a viable dark matter (DM) candidate. In this paper we study indirect detection of the wino-like neutralino DM using positrons and antiprotons from the annihilation in the galactic halo. When the mass is around 2 TeV, which is favored from the thermal relic abundance, the nonperturbation effect significantly enhances the annihilation cross sections into positrons and a...
متن کاملFull One-loop Calculation of Neutralino Annihilation Into Two Photons
For the first time, a full one-loop calculation of the process χχ → 2γ is performed, where χ is the lightest neutralino in the minimal supersymmetric extension of the Standard Model. This process is of interest for dark matter detection, since it would give a sharp γ ray line with Eγ = mχ. We improve upon and correct published formulas, and give cross sections for supersymmetric models with χ m...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1994
ISSN: 0556-2821
DOI: 10.1103/physrevd.49.636