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Title: Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger Observatory

Abstract

Neutrinos in the cosmic ray flux with energies near 1 EeV and above are detectable with the Surface Detector array (SD) of the Pierre Auger Observatory. We report here on searches through Auger data from 1 January 2004 until 20 June 2013. No neutrino candidates were found, yielding a limit to the diffuse flux of ultrahigh energy neutrinos that challenges the Waxman-Bahcall bound predictions. Neutrino identification is attempted using the broad time structure of the signals expected in the SD stations, and is efficiently done for neutrinos of all flavors interacting in the atmosphere at large zenith angles, as well as for “Earth-skimming” neutrino interactions in the case of tau neutrinos. In this paper the searches for downward-going neutrinos in the zenith angle bins 60°–75° and 75°–90° as well as for upward-going neutrinos, are combined to give a single limit. In addition, the 90% C.L. single-flavor limit to the diffuse flux of ultrahigh energy neutrinos with an E –2 spectrum in the energy range 1.0 × 10 17 eV – 2.5 × 10 19 eV is E 2 νdN ν/dE ν < 6.4 × 10 –9 GeV cm –2 s –1 sr –1.

Authors:
 [1]
  1. Univ. Siegen, Siegen (Germany). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
The Pierre Auger Collaboration
OSTI Identifier:
1224596
Alternate Identifier(s):
OSTI ID: 1212760
Report Number(s):
FERMILAB-PUB-15-150-AD-AE-CD-TD
Journal ID: ISSN 1550-7998; PRVDAQ; arXiv eprint number arXiv:1504.05397
Grant/Contract Number:  
AC02-07CH11359; FR02-04ER41300; FG02-99ER41107; SC0011689
Resource Type:
Published Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 91; Journal Issue: 9; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Aab, Alexander. Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger Observatory. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.91.092008.
Aab, Alexander. Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger Observatory. United States. doi:10.1103/PhysRevD.91.092008.
Aab, Alexander. Tue . "Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger Observatory". United States. doi:10.1103/PhysRevD.91.092008.
@article{osti_1224596,
title = {Improved limit to the diffuse flux of ultrahigh energy neutrinos from the Pierre Auger Observatory},
author = {Aab, Alexander},
abstractNote = {Neutrinos in the cosmic ray flux with energies near 1 EeV and above are detectable with the Surface Detector array (SD) of the Pierre Auger Observatory. We report here on searches through Auger data from 1 January 2004 until 20 June 2013. No neutrino candidates were found, yielding a limit to the diffuse flux of ultrahigh energy neutrinos that challenges the Waxman-Bahcall bound predictions. Neutrino identification is attempted using the broad time structure of the signals expected in the SD stations, and is efficiently done for neutrinos of all flavors interacting in the atmosphere at large zenith angles, as well as for “Earth-skimming” neutrino interactions in the case of tau neutrinos. In this paper the searches for downward-going neutrinos in the zenith angle bins 60°–75° and 75°–90° as well as for upward-going neutrinos, are combined to give a single limit. In addition, the 90% C.L. single-flavor limit to the diffuse flux of ultrahigh energy neutrinos with an E–2 spectrum in the energy range 1.0 × 1017 eV – 2.5 × 1019 eV is E2νdNν/dEν < 6.4 × 10–9 GeV cm–2 s–1 sr–1.},
doi = {10.1103/PhysRevD.91.092008},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 9,
volume = 91,
place = {United States},
year = {2015},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.91.092008

Citation Metrics:
Cited by: 37 works
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    Works referencing / citing this record:

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    journal, January 1969


    Cosmogenic neutrinos from ultra-high energy nuclei
    journal, February 2005


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