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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determining the fraction of cosmic-ray protons at ultrahigh energies with cosmogenic neutrinos

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van Vliet, Arjen [1, 2] ; Batist, Rafael Alves [3] ; Horandel, Jorg R. [1, 4, 5]
Total Authors: 3
[1] Radboud Univ Nijmegen, Dept Astrophys, IMAPP, POB 9010, NL-6500 GL Nijmegen - Netherlands
[2] DESY, Platanenallee 6, D-15738 Zeuthen - Germany
[3] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmos, Rua Matao 1226, BR-05508090 Sao Paulo, SP - Brazil
[4] NIKHEF, Sci Pk Amsterdam, NL-1098 XG Amsterdam - Netherlands
[5] Vrije Univ Brussel, Dept Phys & Astron, B-1050 Brussels - Belgium
Total Affiliations: 5
Document type: Journal article
Source: Physical Review D; v. 100, n. 2 JUL 17 2019.
Web of Science Citations: 4

Cosmogenic neutrinos are produced when ultrahigh-energy cosmic rays (UHECRs) interact with cosmological photon fields. Limits on the diffuse flux of these neutrinos can be used to constrain the fraction of protons arriving at Earth with energies E-p greater than or similar to 30 EeV, thereby providing bounds on the composition of UHECRs without fully relying on hadronic interaction models. We show to which extent current neutrino telescopes already constrain this fraction of protons and discuss the prospects for next-generation detectors to further constrain it. Additionally, we discuss the implications of these limits for several popular candidates for UHECR source classes. (AU)

FAPESP's process: 17/12828-4 - Diffusion, acceleration and propagation of cosmic rays in turbulent astrophysical environments
Grantee:Rafael Alves Batista
Support type: Scholarships in Brazil - Post-Doctorate