Signatures of Pseudoscalar Photon Mixing in CMB Radiation

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dc.creatorAgarwal, Nishant
dc.creatorJain, Pankaj
dc.creatorMcKay, Douglas W.
dc.creatorRalston, John P.
dc.date2008-07-29
dc.date.accessioned2026-07-07T11:45:11Z
dc.date.available2026-07-07T11:45:11Z
dc.descriptionWe model the effect of photon and ultra-light pseudoscalar mixing on the propagation of electromagnetic radiation through the extragalactic medium. The medium is modelled as a large number of magnetic domains, uncorrelated with one another. We obtain an analytic expression for the different Stokes parameters in the limit of small mixing angle. The different Stokes parameters are found to increase linearly with the number of domains. We also verify this result by direct numerical simulations. We use this formalism to estimate the effect of pseudoscalar-photon mixing on the Cosmic Microwave Background (CMB) polarization. We impose limits on the model parameters by the CMB observations. We find that the currently allowed parameter range admits a CMB circular polarization up to order $10^{-7}$.
dc.description17 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0807.4587
dc.identifierhttp://arxiv.org/abs/0807.4587
dc.identifierPhys.Rev.D78:085028,2008
dc.identifierdoi:10.1103/PhysRevD.78.085028
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201797
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleSignatures of Pseudoscalar Photon Mixing in CMB Radiation
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