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- W2124023934 abstract "We search for signatures of Lorentz and $CPT$ violations in the cosmic microwave background (CMB) temperature and polarization anisotropies by using the Wilkinson Microwave Anisotropy Probe (WMAP) and the 2003 flight of BOOMERANG (B03) data. We note that if the Lorentz and $CPT$ symmetries are broken by a Chern-Simons term in the effective Lagrangian, which couples the dual electromagnetic field strength tensor to an external four-vector, the polarization vectors of propagating CMB photons will get rotated. Using the WMAP data alone, one could put an interesting constraint on the size of such a term. Combined with the B03 data, we found that a nonzero rotation angle of the photons is mildly favored: $ensuremath{Delta}ensuremath{alpha}=ensuremath{-}6.0genfrac{}{}{0}{}{+4.0}{ensuremath{-}4.0}genfrac{}{}{0}{}{+3.9}{ensuremath{-}3.7}text{ }text{ }mathrm{deg}(1,2ensuremath{sigma})$." @default.
- W2124023934 created "2016-06-24" @default.
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- W2124023934 date "2006-06-07" @default.
- W2124023934 modified "2023-10-16" @default.
- W2124023934 title "Searching for<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml:math>Violation with Cosmic Microwave Background Data from WMAP and BOOMERANG" @default.
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- W2124023934 doi "https://doi.org/10.1103/physrevlett.96.221302" @default.
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