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Título:
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Search for point-like sources of ultra-high energy neutrinos at the pierre auger observatory and improved limit on the diffuse flux of tau neutrinos
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Autores:
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Arganda, E. ;
Arqueros Martínez, Fernando ;
Blanco Ramos, Francisco ;
García Pinto, Diego ;
Minaya Flores, Ignacio Andrés ;
Ortiz Ramis, Montserrat ;
Rosado Vélez, Jaime ;
Vázquez Peñas, José Ramón
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Tipo de documento:
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texto impreso
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Editorial:
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IOP Publishing, 2012-08-10
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física nuclear
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Tipo = Artículo
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Resumen:
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The surface detector array of the Pierre Auger Observatory can detect neutrinos with energy E_? between 10^17 eV and 10^20 eV from point-like sources across the sky south of +55 degrees and north of -65 degrees declinations. A search has been performed for highly inclined extensive air showers produced by the interaction of neutrinos of all flavors in the atmosphere (downward-going neutrinos), and by the decay of tau leptons originating from tau neutrino interactions in Earth's crust (Earth-skimming neutrinos). No candidate neutrinos have been found in data up to 2010 May 31. This corresponds to an equivalent exposure of ?3.5 years of a full surface detector array for the Earth-skimming channel and ?2 years for the downward-going channel. An improved upper limit on the diffuse flux of tau neutrinos has been derived. Upper limits on the neutrino flux from point-like sources have been derived as a function of the source declination. Assuming a differential neutrino flux k_PS . E_nu^-2. from a point-like source, 90% confidence level upper limits for k_PS at the level of ?5x10^-7 and 2.5x10^-6 GeV cm^-2 s^-1 have been obtained over a broad range of declinations from the searches for Earth-skimming and downward-going neutrinos, respectively.
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En línea:
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https://eprints.ucm.es/32879/1/arqueros30libre.pdf
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