IJAA  Vol.5 No.1 , March 2015
The Efficiency of CP-Violating α2-Dynamos from Primordial Cosmic Axion Oscillation with Torsion
ABSTRACT
Recently torsion fields were introduced in CP-violating cosmic axion a2-dynamos [Garcia de Andrade, Mod Phys Lett A, (2011)] in order to obtain Lorentz violating bounds for torsion. Here instead, oscillating axion solutions of the dynamo equation with torsion modes [Garcia de Andrade, Phys Lett B (2012)] are obtained taking into account dissipative torsion fields. Magnetic helicity torsion oscillatory contribution is also obtained. Note that the torsion presence guarantees dynamo efficiency when axion dynamo length is much stronger than the torsion length. Primordial axion oscillations due to torsion yield a magnetic field of 109 G at Nucleosynthesis epoch. This is obtained due to a decay of BBN magnetic field of 1015 G induced by torsion. Since torsion is taken as 10–20 s–1, the dynamo efficiency is granted over torsion damping. Of course dynamo efficiency is better in the absence of torsion. In the particular case when the torsion is obtained from anomalies it is given by the gradient of axion scalar [Duncan et al., Nuclear Phys B 87, 215] that a simpler dynamo equation is obtained and dynamo mechanism seems to be efficient when the torsion helicity, is negative while magnetic field decays when the torsion is positive. In this case an extremely huge value for the magnetic field of 1015 Gauss is obtained. This is one order of magnitude greater than the primordial magnetic fields of the domain wall. Actually if one uses tDW ~ 10-4 s one obtains BDW ~ 1022 G which is a more stringent limit to the DW magnetic primordial field.

Cite this paper
Andrade, L. (2015) The Efficiency of CP-Violating α2-Dynamos from Primordial Cosmic Axion Oscillation with Torsion. International Journal of Astronomy and Astrophysics, 5, 56-59. doi: 10.4236/ijaa.2015.51008.
References
[1]   Campanelli, L. and Gianotti, M. (2005) Magnetic Helicity Generation from the Cosmic Axion Field. Physical Review D, 72, Article ID: 123001.
http://dx.doi.org/10.1103/PhysRevD.72.123001

[2]   Garcia de Andrade, L.C. (2011) Mod Phys Lett A., 26, 2863.

[3]   Garcia de Andrade, L.C. (2012) Primordial Magnetic Fields and Dynamos from Parity Violated Torsion. Physics Letters B, 711, 143-146.
http://dx.doi.org/10.1016/j.physletb.2012.03.075

[4]   Widrow, L. (2001) Rev Mod Phys, 74, 775; Turner, M. and Widrow, L. (1988) Phys Rev D; Prokopec, T., Tornkvist, O. and Woodward, R. (2002) Phys Rev Lett., 89, 101301; Ruzmakin, A., Sokoloff, D.D. and Shukurov, A. (1988) Magnetic Fields in Galaxies, Kluwer; Garcia de Andrade, L.C. (2011) Nuclear Phys B; Garcia de Andrade, L. (2011) Phys Lett B, 468, 28; Ratra, B., Caltech preprint and Garcia de Andrade, L. (2011) Lorentz Violation Bounds from Torsion Trace and Radio Galactic Dynamos. Phys Rev D (Brief Reports).

[5]   Laemmerzahl, C. (1997) Phys Lett A., 228, 223.

[6]   de Sabbata, V., Garcia de Andrade, L.C. and Sivaram, C. (1993) Torsion and Gauge-Invariant Massive Electrodynamics. International Journal of Theoretical Physics, 32, 1523-1530.
http://dx.doi.org/10.1007/BF00672853

[7]   Duncan, M., Kaloper, N. and Olive, K.A. (1992) Nucl Phys B, 87, 215.

[8]   Cea, P. and Tedesco, L. (year) Dynamical Generation of the Primordial Magnetic Field by Ferromagnetic Domain Walls. arXiv:hep-th/9811221v1.

[9]   Kisslinger, L.S. (2003) Magnetic Wall from Chiral Phase Transition and CMPR Correlations. arXiv: hep-ph/0212206v2.

 
 
Top