Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2012-03-14
Physics
Nuclear Physics
Nuclear Theory
8 pages, 10 figures, 5 tables
Scientific paper
Is expected that the magnetic field in the surface of magnetars do not exceed $10^{15}$ G. However, in heavy ion collisions, this value could be higher. We investigate the effects of a magnetic field of the order of $10^{18}$, $10^{19}$ and $10^{20}$ G in strange matter (composed of $u$, $d$ and $s$ quarks). We model matter as a free gas of baryons and mesons under the influence of an external magnetic field. We study the effects of such strong fields through a $\chi^2$ fit to some data sets of the STAR experiment. For this purpose we solve the Dirac, Rarita-Schwinger, Klein-Gordon and Proca equations subject to magnetic fields in order to obtain the energy expressions and the degenerescence for spin 1/2, spin 3/2, spin 0 and spin 1 particles, respectively. Our results shown that a field of the order of $10^{19}$ G produce a much better fit to the experimental data than the calculations without magnetic field.
de Paoli M. G.
Menezes Débora P.
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