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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/14594

Title: Fluxes of cosmic rays: a delicately balanced stationary state
Other Titles: Physics Letters A
Authors: Borges, Ernesto Pinheiro
Tsallis, Constantino
Anjos, João C.
Keywords: Raios cósmicos;Física nuclear
Issue Date: 2003
Abstract: The analysis of cosmic rays fluxes as a function of energy reveals a knee slightly below 1016 eV and an ankle close to 1019 eV. Their physical origins remain up to now quite enigmatic; in particular, no elementary process is known which occurs at energies close to 1016 eV. We propose a phenomenological approach along the lines of nonextensive statistical mechanics, a formalism which contains Boltzmann–Gibbs statistical mechanics as a particular case. The knee then appears as a crossover between two fractal-like thermal regimes, the crossover being caused by process occurring at energies ten million times lower than that of the knee, in the region of the quark hadron transition (≃109 eV). This opens the door to an unexpected standpoint for further clarifying the phenomenon.
Description: Texto completo: acesso restrito. p. 372–376
URI: http://repositorio.ufba.br/ri/handle/ri/14594
ISSN: 0375-9601
Appears in Collections:Artigos Publicados em Periódicos (FIS)

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