Large-scale magnetic fields from inflation due to a CPT-even Chern-Simons-like term with Kalb-Ramond and scalar fields

Kazuharu Bamba*, C. Q. Geng, S. H. Ho, Win-Fun Kao

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    9 Scopus citations

    Abstract

    We investigate the generation of large-scale magnetic fields due to the breaking of the conformal invariance in the electromagnetic field through the CPT-even dimension-six Chern-Simons-like effective interaction with a fermion current by taking account of the dynamical Kalb-Ramond and scalar fields in inflationary cosmology. It is explicitly demonstrated that magnetic fields on 1 Mpc scale with the field strength of ~10-9 G at the present time can be induced.

    Original languageEnglish
    Article number1978
    Pages (from-to)1-10
    Number of pages10
    JournalEuropean Physical Journal C
    Volume72
    Issue number4
    DOIs
    StatePublished - 1 Jan 2012

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