2011/04/30 by Johan Bonnevier, Henrik Melbeus, Henrik Melbéus +2 · 20 citations
Physics and Astronomy · #Annihilation #Astrophysics #Boson #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Fermion #Gamma ray #Gauge (firearms) #Gauge boson #Gauge theory #Kaluza–Klein theory #Light dark matter #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Scalar field dark matter #Standard Model (mathematical formulation) #Theoretical physics #astro-ph.HE #hep-ph
paper · pdf · doi:10.1103/physrevd.85.043524
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 85(4) (American Physical Society) · 21 pages, 6 figures, REVTeX4. Minor misprints corrected
openalex publication_date 2012/02/22 · arxiv created 2012/04/25 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate monoenergetic gamma-ray signatures from annihilations of dark matter comprised of Z1, the first Kaluza-Klein (KK) excitation of the Z boson in a nonminimal universal extra dimensions (UED) model. The self interactions of the non-Abelian Z1 gauge boson give rise to a large number of contributing Feynman diagrams that do not exist for annihilations of the Abelian gauge boson B1, which is the standard Kaluza-Klein dark matter (KKDM) candidate. We find that the annihilation rate is indeed considerably larger for the Z1 than for the B1. Even though relic density calculations indicate that the mass of the Z1 should be larger than the mass of the B1, the predicted monoenergetic gamma fluxes are of the same order of magnitude. We compare our results to existing experimental limits, as well as to future sensitivities, for image air Cherenkov telescopes, and we find that the limits are reached already with a moderately large boost factor. The realistic prospects for detection depend on the experimental energy resolution.