https://repositorio.ufba.br/handle/ri/14594
metadata.dc.type: | Artigo de Periódico |
Title: | Fluxes of cosmic rays: a delicately balanced stationary state |
Other Titles: | Physics Letters A |
Authors: | Borges, Ernesto Pinheiro Tsallis, Constantino Anjos, João C. |
metadata.dc.creator: | Borges, Ernesto Pinheiro Tsallis, Constantino Anjos, João C. |
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. |
Keywords: | Raios cósmicos Física nuclear |
metadata.dc.rights: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14594 |
Issue Date: | 2003 |
Appears in Collections: | Artigo Publicado em Periódico (FIS) |
File | Description | Size | Format | |
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Ernesto P. Borges.pdf | 106,45 kB | Adobe PDF | View/Open |
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