QCD correction to neutralino annihilation process and dark matter density in supersymmetric models

Takeo Moroi, Yukinari Sumino, Akira Yotsuyanagi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We calculate QCD correction to the neutralino annihilation cross section into quark antiquark final state and discuss its implications to the calculation of neutralino relic density. We see that the QCD correction enhances the pair-annihilation cross section by O(10%) when final-state quarks are nonrelativistic. Consequently, when the lightest neutralinos dominantly annihilate into a tt̄ pair, the relic density of the lightest neutralino is significantly affected by the QCD correction, in particular, when the lightest-neutralino mass is close to the top-quark mass.

Original languageEnglish
Article number015016
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number1
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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