Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-02-17
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages. arXiv admin note: substantial text overlap with arXiv:1106.4962
Scientific paper
Intergalactic magnetic fields are assumed to have been spontaneously generated at the reheating stage of the early Universe, due to vacuum polarization of non-Abelian gauge fields at high temperature. The fact that the screening mass of this type of fields has zero value was discovered recently. A procedure to estimate their field strengths, $B(T)$, at different temperatures is here developed, and the value $B(T_{ew}) \sim 10^{14} G$ at the electroweak phase transition temperature, is derived by taking into consideration the present value of the intergalactic magnetic field strength, $B_0 \sim 10^{- 15} G$, coherent on the $\sim 1$ Mpc scale. As a particular case, the standard model is considered and the field scale at high temperature is estimated in this case. Model dependent properties of the phenomena under investigation are briefly discussed, too.
Elizalde Emilio
Skalozub Vladimir
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