Evidence for Radio Detection of Extensive Air Showers Induced by Ultra High Energy Cosmic Rays
D. Ardouin, A. Bellétoile, D. Charrier, R. Dallier, T. Gousset, F. Haddad, J. Lamblin, P. Lautridou, O. Ravel, A. Lecacheux, L. Denis, P. Eschstruth, D. Monnier-Ragaigne
Abstract
Firm evidence for a radio emission counterpart of cosmic ray air showers is presented. By the use of an antenna array set up in coincidence with ground particle detectors, we find a collection of events for which both time and arrival direction coincidences between particle and radio signals are observed. The counting rate corresponds to shower energies 5× 1016 eV. These results open overwhelming perspectives to complete existing detection methods for the observation of ultra high-energy cosmic rays.
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