https://repositorio.ufba.br/handle/ri/14594
Tipo: | Artigo de Periódico |
Título: | Fluxes of cosmic rays: a delicately balanced stationary state |
Título(s) alternativo(s): | Physics Letters A |
Autor(es): | Borges, Ernesto Pinheiro Tsallis, Constantino Anjos, João C. |
Autor(es): | 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. |
Palavras-chave: | Raios cósmicos Física nuclear |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14594 |
Data do documento: | 2003 |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS) |
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Ernesto P. Borges.pdf | 106,45 kB | Adobe PDF | Visualizar/Abrir |
Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.