New limit on pseudoscalar-photon mixing from WMAP observations

Prabhakar Tiwari

doi:10.1103/PhysRevD.86.115025

New limit on pseudoscalar-photon mixing from WMAP observations

Prabhakar Tiwari^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Pseudoscalar-photon mixing in the presence of a large scale magnetic field induces polarization in light from distant cosmological sources. We study the effect of these pseudoscalars or axionlike particles on cosmic microwave background radiation and constrain the product of mixing strength g times background magnetic field B. The background magnetic field has been assumed to be primordial, and we assume large scale correlations with the correlation length of 1 Mpc. We use WMAP seven-year foreground reduced polarization and temperature data to constrain the pseudoscalar-photon mixing parameter. We look for different mass limits of the pseudoscalars and find gB≤1.6×10 ^-13 GeV^-1 nG with axionlike particles of mass 10 ^-10 eV and gB≤3.4×10^-15 GeV^-1 nG for ultralight axionlike particles of mass 10^-15 eV.

Original language	English
Article number	115025
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	86
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.86.115025
State	Published - 28 Dec 2012
Externally published	Yes

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10.1103/PhysRevD.86.115025

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title = "New limit on pseudoscalar-photon mixing from WMAP observations",

abstract = "Pseudoscalar-photon mixing in the presence of a large scale magnetic field induces polarization in light from distant cosmological sources. We study the effect of these pseudoscalars or axionlike particles on cosmic microwave background radiation and constrain the product of mixing strength g times background magnetic field B. The background magnetic field has been assumed to be primordial, and we assume large scale correlations with the correlation length of 1 Mpc. We use WMAP seven-year foreground reduced polarization and temperature data to constrain the pseudoscalar-photon mixing parameter. We look for different mass limits of the pseudoscalars and find gB≤1.6×10 -13 GeV-1 nG with axionlike particles of mass 10 -10 eV and gB≤3.4×10-15 GeV-1 nG for ultralight axionlike particles of mass 10-15 eV.",

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AB - Pseudoscalar-photon mixing in the presence of a large scale magnetic field induces polarization in light from distant cosmological sources. We study the effect of these pseudoscalars or axionlike particles on cosmic microwave background radiation and constrain the product of mixing strength g times background magnetic field B. The background magnetic field has been assumed to be primordial, and we assume large scale correlations with the correlation length of 1 Mpc. We use WMAP seven-year foreground reduced polarization and temperature data to constrain the pseudoscalar-photon mixing parameter. We look for different mass limits of the pseudoscalars and find gB≤1.6×10 -13 GeV-1 nG with axionlike particles of mass 10 -10 eV and gB≤3.4×10-15 GeV-1 nG for ultralight axionlike particles of mass 10-15 eV.

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New limit on pseudoscalar-photon mixing from WMAP observations

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