Reinterpreting the development of extensive air showers initiated by nuclei and photons

  title={Reinterpreting the development of extensive air showers initiated by nuclei and photons},
  author={Manlio De Domenico and Mariangela Settimo and Simone Riggi and Eric Bertin},
  journal={arXiv: High Energy Physics - Phenomenology},
Ultra-high energy cosmic rays (UHECRs) interacting with the atmosphere generate extensive air showers (EAS) of secondary particles. The depth corresponding to the maximum development of the shower, $\Xmax$, is a well-known observable for determining the nature of the primary cosmic ray which initiated the cascade process. In this paper, we present an empirical model to describe the distribution of $\Xmax$ for EAS initiated by nuclei, in the energy range from $10^{17}$ eV up to $10^{21}$ eV, and… 

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