|
|||||
|
|
Upper limit on the diffuse flux of ultrahigh energy tau neutrinos from the Pierre Auger Observatory |
|
| Authors: | Abraham J Abreu P Aglietta M Aguirre C Allard D Allekotte I Allen J Allison P Alvarez-Muñiz J Ambrosio M Anchordoqui L Andringa S Anzalone A Aramo C Argirò S Arisaka K Armengaud E Arneodo F Arqueros F Asch T Asorey H Assis P Atulugama B S Aublin J Ave M Avila G Bäcker T Badagnani D Barbosa A F Barnhill D Barroso S L C Bauleo P Beatty J J Beau T Becker B R Becker K H Bellido J A BenZvi S Berat C Bergmann T Bernardini P Bertou X Biermann P L Billoir P Blanch-Bigas O Blanco F Blasi P Bleve C Blümer H Bohácová M Bonifazi C Bonino R Boratav M Brack J Brogueira P Brown W C Buchholz P Bueno A |
| Institution: | Centro de Investigaciones en Laseres y Aplicaciones, CITEFA and CONICET, Argentina. |
| Abstract: | 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(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(tau) at EeV energies. Assuming an E(nu)(-2) differential energy spectrum the limit set at 90% C.L. is E(nu)(2)dN(nu)(tau)/dE(nu)<1.3 x 10(-7) GeV cm(-2) s(-1) sr(-1) in the energy range 2 x 10(17) eV< E(nu)< 2 x 10(19) eV. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |