Tomislav Prokopec and Ewald Puchwein JCAP04(2004)007 doi:10.1088/1475-7516/2004/04/007
Photon mass generation during inflation: de Sitter invariant case
Tomislav Prokopec and Ewald Puchwein
Show affiliations We calculate the one-loop vacuum polarization tensor of scalar electrodynamics in a locally de Sitter space-time, endowed with a nearly minimally coupled, light scalar field. We show that the photon dynamics is well approximated by a (local) Proca Lagrangean. Since the photon mass can be much larger than the Hubble parameter, the photons may propagate slowly during inflation. Finally, we briefly discuss magnetic field generation on cosmological scales, and point out that while the spectrum of the magnetic field is identical to that obtained from the massless scalar, B
B0/, the amplitude B0 may be significantly enhanced, implying that the seed field bound for the galactic dynamo can be easily met.
- Keywords
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E-print Number: astro-ph/0312274
Cited: by |
Refers: to
- PACS
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95.30.Cq Elementary particle processes
11.10.Ef Lagrangian and Hamiltonian approach
98.65.Hb Intracluster matter; cooling flows
- Subjects
- Dates
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Issue 04 (April 2004)
Received 16 December 2003, accepted for publication 1 April 2004
Published 27 April 2004
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Photon mass generation during inflation: de Sitter invariant case
Tomislav Prokopec and Ewald Puchwein JCAP04(2004)007
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