Non-gaussian statistics and the relativistic nuclear equation of state
| Autor: | Pereira, F. I. M., Silva, R., Alcaniz, J. S. |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Nucl.Phys.A828:136-148,2009 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.nuclphysa.2009.06.024 |
| Popis: | We investigate possible effects of quantum power-law statistical mechanics on the relativistic nuclear equation of state in the context of the Walecka quantum hadrodynamics theory. By considering the Kaniadakis non-Gaussian statistics, characterized by the index $\kappa$ (Boltzmann-Gibbs entropy is recovered in the limit $\kappa\to 0$), we show that the scalar and vector meson fields become more intense due to the non-Gaussian statistical effects ($\kappa \neq 0$). From an analytical treatment, an upper bound on $\kappa$ ($\kappa < 1/4$) is found. We also show that as the parameter $\kappa$ increases the nucleon effective mass diminishes and the equation of state becomes stiffer. A possible connection between phase transitions in nuclear matter and the $\kappa$-parameter is largely discussed. Comment: 8 pages, 8 fifures, LaTeX |
| Databáze: | arXiv |
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