Estimation of radio emission from neutrino induced showers in rock salt above 1018 eV

Abstract

Emission of electromagnetic waves from high energy particle showers is a powerful tool that can be used to detect the most elusive cosmic neutrinos of astrophysical or cosmogenic origin. We present here simulations of showers with a primary energy in the range 1018−1021 eV initiated by νe, νμ and ντ neutrinos. A medium that is both dense and transparent in the low radio frequencies part of the electromagnetic spectrum, like rock salt, is used as active medium where the shower develops. The calculation of the radio signal was performed by approximating the shower with a current density using the longitudinal profile of the charge excess, for estimation at low frequencies, below 500 MHz.The aim of this work is to give estimates of the amplitude of the signal induced by νe, νμ and ντ neutrinos.