Fluxes of cosmic rays: A delicately balanced stationary state

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dc.creatorTsallis, Constantino
dc.creatorAnjos, Joao C.
dc.creatorBorges, Ernesto P.
dc.date2002-03-15
dc.date2004-04-03
dc.date.accessioned2026-07-07T02:03:09Z
dc.date.available2026-07-07T02:03:09Z
dc.descriptionThe analysis of cosmic rays fluxes as a function of energy reveals a {\it knee} slightly below $10^{16}$ eV and an {\it ankle} close to $10^{19}$ eV. Their physical origins remain up to now quite enigmatic; in particular, no elementary process is known which occurs at energies close to $10^{16}$ 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 ($\simeq 10^{9}$ eV). This opens the door to an unexpected standpoint for further clarifying the phenomenon.
dc.descriptionRevTeX, 10 pages including 1 eps figure
dc.identifierhttps://arxiv.org/abs/astro-ph/0203258
dc.identifierhttp://arxiv.org/abs/astro-ph/0203258
dc.identifierPhys.Lett. A310 (2003) 372
dc.identifierdoi:10.1016/S0375-9601(03)00377-3
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4286
dc.subjectAstrophysics
dc.subjectCondensed Matter
dc.titleFluxes of cosmic rays: A delicately balanced stationary state
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