RT Journal Article
T1 Primordial torsion fields as an explanation of the anisotropy in cosmological electromagnetic propagation
A1 Dobado González, Antonio
A1 López Maroto, Antonio
AB In this letter we provide a simple explanation of the recent finding of anisotropy in electromagnetic (EM) propagation claimed by Nodland and Ralston. We consider, as a possible origin of such effect, the effective coupling between EM fields and some tiny background torsion field. The coupling is obtained after integrating out charged fermions, it is gauge-invariant and does not require the introduction of any new physics.
PB World Scientific Publ Co Pte Ltd
SN 0217-7323
YR 1997
FD 1997-12-14
LK https://hdl.handle.net/20.500.14352/58728
UL https://hdl.handle.net/20.500.14352/58728
LA eng
NO 1. B. Nodland and J. P. Ralston, Phys. Rev. Lett. 78, 3043 (1997).2. D. J. Eisenstein and E. F. Bunn, astro-ph/9704247; S. M. Carroll and G. B. Field, Phys. Rev. Lett. 79, 2394 (1997); J. P. Leahy, astro-ph/9704285; J. F. C. Wardle, R. A. Perley and M. H. Cohen, Phys. Rev. Lett. 79, 1801 (1997); T. J. Loredo, E. E. Flanagan and I. M. Wasserman, astro-ph/9706258.3. B. Nodland and J. P. Ralston, Phys. Rev. Lett. 79, 1958 (1997); astro-ph/9706126; astro-ph/9708114.4. D. V. Ahluwalia and T. Goldman, Mod. Phys. Lett. A8, 2623 (1993); R. W. Kuhne, ibid. A12, 2473 (1997).5. F. W. Hehl, P. von der Heyde, G. D. Kerlick and J. M. Nester, Rev. Mod. Phys. 48, 393 (1976).6. A. Dobado and A. L. Maroto, Phys. Rev. D54, 5185 (1996).7. V. De Sabbata and M. Gasperini, Phys. Lett. A83, 115 (1981).8. S. M. Carroll and G. B. Field, Phys. Rev. D50, 3867 (1994); R. T. Hammond, ibid. D52, 6918 (1995).
NO © World Scientic Publishing Company. We are grateful to B. Nodland for his  comments to the preliminary version of this letter and also to J. P. Ralston for his suggestions. This work has been supported in part by the Ministerio de Educaci_on y Ciencia (Spain) (CICYT AEN96-1634).
NO Ministerio de Educación y Ciencia (Spain)
NO CICYT
DS Docta Complutense
RD 30 abr 2024