par Ahrens, J.;Bertrand, Daniel 
;Frère, Jean-Marie ;Hanson, Kael ; [et al.]
Référence Physical review. D, Particles, fields, gravitation, and cosmology, 67, 012003-1, page (1-10)
Publication Publié, 2003
;Frère, Jean-Marie ;Hanson, Kael ; [et al.]Référence Physical review. D, Particles, fields, gravitation, and cosmology, 67, 012003-1, page (1-10)
Publication Publié, 2003
Article révisé par les pairs
| Résumé : | We report on a search for electromagnetic and/or hadronic showers (cascades) induced by a diffuse flux of neutrinos with energies between 5 TeV and 300 TeV from extraterrestrial sources. Cascades may be produced by matter interactions of all flavors of neutrinos, and contained cascades have better energy resolution and afford better background rejection than throughgoing νμ-induced muons. Data taken in 1997 with the AMANDA detector were searched for events with a high-energy cascadelike signature. The observed events are consistent with expected backgrounds from atmospheric neutrinos and catastrophic energy losses from atmospheric muons. Effective volumes for all flavors of neutrinos, which allow the calculation of limits for any neutrino flux model, are presented. The limit on cascades from a diffuse flux of νe+ νμ + ντ+ ν̄e + ν̄μ+ ν̄τ is E2(dΦ/dE)<9.8×10-6 GeV cm-2 s-1 sr-1, assuming a neutrino flavor flux ratio of 1:1:1 at the detector. The limit on cascades from a diffuse flux of νe+ν̄e is E2(dΦ/dE)<6. 5×10-6 GeV cm-2 s-1 sr-1, independent of the assumed neutrino flavor flux ratio. © 2003 The American Physical Society. |
