Enhancement of Dark Matter Annihilation via Breit-Wigner Resonance

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dc.creatorGuo, Wan-Lei
dc.creatorWu, Yue-Liang
dc.date2009-01-11
dc.date2009-03-04
dc.date.accessioned2026-07-07T13:05:29Z
dc.date.available2026-07-07T13:05:29Z
dc.descriptionThe Breit-Wigner enhancement of the thermally averaged annihilation cross section <σv> is shown to provide a large boost factor when the dark matter annihilation process nears a narrow resonance. We explicitly demonstrate the evolution behavior of the Breit-Wigner enhanced <σv> as the function of universe temperature for both the physical and unphysical pole cases. It is found that both of the cases can lead an enough large boost factor to explain the recent PAMELA, ATIC and PPB-BETS anomalies. We also calculate the coupling of annihilation process, which is useful for an appropriate model building to give the desired dark matter relic density.
dc.description4 pages, 4 figures, references added, accepted for publication in Physical Review D
dc.identifierhttps://arxiv.org/abs/0901.1450
dc.identifierhttp://arxiv.org/abs/0901.1450
dc.identifierPhys.Rev.D79:055012,2009
dc.identifierdoi:10.1103/PhysRevD.79.055012
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/227505
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectCosmology and Nongalactic Astrophysics
dc.titleEnhancement of Dark Matter Annihilation via Breit-Wigner Resonance
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