Abstract
Recently Salim et al. (2007), have shown that galactic dynamo seeds can be possibly attainable in bouncing cosmological models with QED Lagrangeans. In this study we generalise their result by include torsion of spacetime in bouncing cosmology. It is shown that by considering a semi-minimal photon-torsion coupling and a Lagrangean of the type RF2 it is possible to find a fast decoupling between magnetic and torsion fields in the contracting phases of the universe. Besides torsion field decays as K∼α2/3 while the magnetic field grows as B∼α−5.5 thus explaining the fast decoupling between the two fields. It is expected that at some point of the contracting phase the amplification of the magnetic field may give rise to a enough strong magnetic field to seed a galactic dynamo.
Highlights
Enqvist et al (1992) place limits on neutrino masses from galactic dynamo mechanism
Since neutrino masses are important in extending the standard model of particle physics, it seems worth to investigate the relation between Lorentz Violation (LV) and galactic dynamos in torsion fields for example (Campanelli et al, 2009; Barrow and Tsagas, 2008)
We show that the use of this photon sector coupled semi-minimally with torsion mode, in scales of 10 kpc would require a not very strong torsion field that might exist in nature, so it seems that the only conclusion is that this necessary imply that galactic magnetic fields can be seeded by a such torsion models in the (Mazzitelli and Spedalieri, 1988) scalar electrodynamics
Summary
Enqvist et al (1992) place limits on neutrino masses from galactic dynamo mechanism. Since neutrino masses are important in extending the standard model of particle physics, it seems worth to investigate the relation between Lorentz Violation (LV) and galactic dynamos in torsion fields for example (Campanelli et al, 2009; Barrow and Tsagas, 2008). In previous work (Barrow and Tsagas, 2008) one notice that semi-minimal coupling has been used on a Lagrangean of the type. This has provided further constraints on torsion up to 10−31GeV. We show that the use of this photon sector coupled semi-minimally with torsion mode, in scales of 10 kpc would require a not very strong torsion field that might exist in nature, so it seems that the only conclusion is that this necessary imply that galactic magnetic fields can be seeded by a such torsion models in the (Mazzitelli and Spedalieri, 1988) scalar electrodynamics.
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