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- W1615151177 abstract "We perform a wavelet analysis of the temperature and polarization maps of the cosmic microwave background (CMB) delivered by the Wilkinson Microwave Anisotropy Probe experiment in search for a parity-violating signal. Such a signal could be seeded by new physics beyond the standard model, for which the Lorentz and CPT symmetries may not hold. Under these circumstances, the linear polarization direction of a CMB photon may get rotated during its cosmological journey, a phenomenon also called cosmological birefringence. Recently, Feng et al. have analyzed a subset of the Wilkinson Microwave Anisotropy Probe and BOOMERanG 2003 angular power spectra of the CMB, deriving a constraint that mildly favors a nonzero rotation. By using wavelet transforms we set a tighter limit on the CMB photon rotation angle {delta}{alpha}=-2.5{+-}3.0 ({delta}{alpha}=-2.5{+-}6.0) at the one (two) {sigma} level, consistent with a null detection." @default.
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- W1615151177 date "2007-12-28" @default.
- W1615151177 modified "2023-10-17" @default.
- W1615151177 title "Constraints onCPTviolation from Wilkinson Microwave Anisotropy Probe three year polarization data: A wavelet analysis" @default.
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- W1615151177 doi "https://doi.org/10.1103/physrevd.76.123014" @default.
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