Constraints on CPT violation from WMAP three year polarization data: a wavelet analysis

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dc.creatorCabella, Paolo
dc.creatorNatoli, Paolo
dc.creatorSilk, Joseph
dc.date2007-05-06
dc.date2007-11-12
dc.date.accessioned2026-07-07T11:20:31Z
dc.date.available2026-07-07T11:20:31Z
dc.descriptionWe perform a wavelet analysis of the temperature and polarization maps of the Cosmic Microwave Background (CMB) delivered by the WMAP 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 the WMAP and BOOMERanG 2003 angular power spectra of the CMB, deriving a constraint that mildly favors a non zero rotation. By using wavelet transforms we set a tighter limit on the CMB photon rotation angle Δα= -2.5 \pm 3.0 (Δα= -2.5 \pm 6.0) at the one (two) σlevel, consistent with a null detection.
dc.description7 pages, 4 figures, some modifications to match accepted (PRD) version, results unchanged
dc.identifierhttps://arxiv.org/abs/0705.0810
dc.identifierhttp://arxiv.org/abs/0705.0810
dc.identifierPhys.Rev.D76:123014,2007
dc.identifierdoi:10.1103/PhysRevD.76.123014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193986
dc.subjectAstrophysics
dc.titleConstraints on CPT violation from WMAP three year polarization data: a wavelet analysis
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