Thinned simulations of extremely energetic showers in dense media for radio applications |
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Authors: | J Alvarez-Muiz CW James RJ Protheroe E Zas |
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Institution: | aDepto. de Física de Partículas and Instituto Galego de Física de Altas Enerxías, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain;bDepartment of Physics, School of Chemistry and Physics, University of Adelaide, SA 5005, Australia |
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Abstract: | This paper presents our results for full 3-D simulations of very-high to ultra-high energy electromagnetic cascades – and the associated coherent Cherenkov radiation – as might be produced by high-energy neutrino interactions in dense media. Using “thinning” techniques, we develop an algorithm based on the existing “ZHS” code, and demonstrate that the new “ZHS-thinned” code can produce fast and accurate results for showers up to . Using ZHS-thinned, we develop new parameterisations for the radiation from showers in ice, salt, and the lunar regolith, with a separate treatment of the megaregolith (deep regolith). Our parameterisations include for the first time a method to simulate fluctuations in shower length induced by the LPM effect. Our results, which avoid the pit-falls of scaling simulations from lower energies, allow improved calculations of the detection probability for experiments searching for high-energy neutrinos using the radio technique. |
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Keywords: | High-energy cosmic rays and neutrinos High-energy showers Cherenkov radio emission |
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