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2007-08-31 - Article/Dans un journal avec peer-review - Anglais - 20 page(s)

Kohnen Georges , IceCube Collaboration, "Multiyear search for a diffuse flux of muon neutrinos with AMANDA-II" in Physical Review. D, Particles, Fields, Gravitation, and Cosmology, 76, 4, 042008

  • Edition : American Physical Society, College Park (MD)
  • Codes CREF : Physique des particules élémentaires (DI1221), Astrophysique (DI1455)
  • Unités de recherche UMONS : Physique nucléaire et subnucléaire (S824)
  • Instituts UMONS : Institut de Recherche sur les Systèmes Complexes (Complexys)
  • Centres UMONS : Algèbre, Géométrie et Interactions fondamentales (AGIF)

Abstract(s) :

(Anglais) A search for TeV-PeV muon neutrinos from unresolved sources was performed on AMANDA-II data collected between 2000 and 2003 with an equivalent live time of 807 days. This diffuse analysis sought to find an extraterrestrial neutrino flux from sources with nonthermal components. The signal is expected to have a harder spectrum than the atmospheric muon and neutrino backgrounds. Since no excess of events was seen in the data over the expected background, an upper limit of E2PHI90%C.L.<7.4×10−8  GeV cm−2 s−1 sr−1 is placed on the diffuse flux of muon neutrinos with a Φ∝E−2 spectrum in the energy range 16 TeV to 2.5 PeV. This is currently the most sensitive PHI prop. E−2 diffuse astrophysical neutrino limit. We also set upper limits for astrophysical and prompt neutrino models, all of which have spectra different from PHI prop. E−2.

Identifiants :
  • DOI : 10.1103/PhysRevD.76.042008