INVESTIGADORES
MARIAZZI Analisa Gabriela
artículos
Título:
Search for ultrahigh energy neutrinos in highly inclined events at the Pierre Auger Observatory
Autor/es:
PIERRE AUGER COLLABORATION (J. ABRAHAM, ... , A. MARIAZZI, ET AL)
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
American Physical Society
Referencias:
Año: 2011 vol. 84 p. 122005 - 122005
ISSN:
0556-2821
Resumen:
The Surface Detector of the Pierre Auger Observatory is sensitive to
neutrinos of all flavors above 0.1 EeV. These interact through charged
and neutral currents in the atmosphere giving rise to extensive air
showers. When interacting deeply in the atmosphere at nearly horizontal
incidence, neutrinos can be distinguished from regular hadronic cosmic
rays by the broad time structure of their shower signals in the
water-Cherenkov detectors. In this paper we present for the first time
an analysis based on down-going neutrinos. We describe the search
procedure, the possible sources of background, the method to compute the
exposure and the associated systematic uncertainties. No candidate
neutrinos have been found in data collected from 1 January 2004 to 31
May 2010. Assuming an E-2 differential energy spectrum the limit on the single-flavor neutrino is E2dN/dE<1.74×10-7GeVcm-2s-1sr-1 at 90% C.L. in the energy range 1×1017eV<E<1×1020eV.