Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory
- Universidad Tecnologica Nacional, FR-Mendoza (Argentina)
- LIP and Instituto Superior Tecnico, Lisboa (Portugal)
- Istituto di Fisica dello Spazio Interplanetario (INAF), Universita di Torino and Sezione INFN, Torino (Italy)
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from {nu}{sub {tau}} charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January 2004 and 31 August 2007 are used to place an upper limit on the diffuse flux of {nu}{sub {tau}} at EeV energies. Assuming an E{sub {nu}}{sup -2} differential energy spectrum the limit set at 90% C.L. is E{sub {nu}}{sup 2}dN{sub {nu}{sub {tau}}}/dE{sub {nu}}<1.3x10{sup -7} GeV cm{sup -2} s{sup -1} sr{sup -1} in the energy range 2x10{sup 17} eV<E{sub {nu}}<2x10{sup 19} eV.
- OSTI ID:
- 21132461
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.100.211101; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). Pierre Auger Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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