On the chemical composition of cosmic rays of highest energy

  title={On the chemical composition of cosmic rays of highest energy},
  author={Grzegorz Wilk and Zbigniew Włodarczyk},
  journal={Journal of Physics G},
We present arguments aiming at reconciling apparently contradictory results concerning the chemical composition of cosmic rays (CRs) of highest energy, coming recently from the Auger and HiRes collaborations. In particular, we argue that the energy dependence of the mean value and root mean square fluctuation of shower maxima distributions observed by the Auger experiment are not necessarily caused by the change of the nuclear composition of primary CRs. They could also be caused by the change… 

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