Wu, E.Y.S. and Ade, P. and Bock, J. and Bowden, M. and Brown, M.L. and Cahill, G. and Castro, P.G. and Church, S. and Culverhouse, T. and Friedman, R.B. and Ganga, K. and Gear, W.K. and Gupta, S. and Hinderks, J. and Kovac, J. and Lange, A.E. and Leitch, E. and Melhuish, S.J. and Memari, Y. and Murphy, J.A. and Orlando, A. and Piccirillo, L. and Pryke, C. and Rajguru, N. and Rusholme, B. and Schwarz, R. and O'Sullivan, C. and Taylor, A.N. and Thompson, K.L. and Turner, A.H. and Zemcov, M.
Parity Violation Constraints Using Cosmic Microwave Background Polarization Spectra
from 2006 and 2007 Observations by the QUaD Polarimeter.
Physical Review Letters, 102.
We constrain parity-violating interactions to the surface of last scattering using spectra from the QUaD experiment’s second and third seasons of observations by searching for a possible systematic rotation of the polarization directions of cosmic microwave background photons. We measure the rotation angle due to such a possible “cosmological birefringence” to be 0.55°±0.82° (random) ±0.5° (systematic) using QUaD’s 100 and 150 GHz temperature-curl and gradient-curl spectra over the spectra over the multipole range 200<ℓ<2000, consistent with null, and constrain Lorentz-violating interactions to <2×10-43 GeV (68% confidence limit). This is the best constraint to date on electrodynamic parity violation on cosmological scales.
Repository Staff Only(login required)
||Item control page