New Constraints from Haverah Park Data on the Photon and Iron Fluxes of Ultrahigh-Energy Cosmic Rays

2000/07/27 by M. Ave, J. A. Hinton, R. A. Vázquez +3 · 6 citations
Physics and Astronomy · #Air shower #Astrophysics #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Cosmic ray #Dark Matter and Cosmic Phenomena #Detector #Nuclear physics #Optics #Particle physics theoretical and experimental studies #Photon #Physics #Ultra-high-energy cosmic ray #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevlett.85.2244

published as Phys.Rev.Lett.85:2244-2247,2000 · Latex, 4 pages, 2 eps figures included. Accepted for publication in Physical Review Letters

arxiv created 2000/07/27 · openalex publication_date 2000/09/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Using data from inclined events ( 60\ifmmode^∘\else\textdegree\fi<\ensuremathθ<80\ifmmode^∘\else\textdegree\fi) recorded by the Haverah Park shower detector, we show that above 10¹⁹eV less than 41% ( 54%) of the primary cosmic rays can be photons (iron nuclei) at the 95% confidence level. Above 4\ifmmode×\else\texttimes\fi10¹⁹eV less than 65% of the cosmic rays can be photonic at the same confidence level. These limits place important constraints on some models of the origin of ultrahigh-energy cosmic rays. Details of two new events above 10²⁰eV are reported.

Citations

• Bremsstrahlung and Pair Production in Condensed Media at High Energies

Cited by

• The anisotropy of the ultra-high energy cosmic rays
• Astrophysical origins of ultrahigh energy cosmic rays
• The footprint of large scale cosmic structure on the ultrahigh energy cosmic ray distribution
• Particle Diffusion and Acceleration by Shock Waves in Magnetized Filamentary Turbulence
• Neutrino detection with inclined air showers
• The meaning of the UHECR Hot Spots
• Neutrinos associated with cosmic rays of top–down origin