Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.161302
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Funding
- National Science Foundation in the U.S. [ANT-0637420, ANT-0739729, ANT-0638615, ANT-0638352, ANT-0739413, AST-0096778, ANT-0338138, ANT-0338335, ANT- 0338238]
- U.K. Science and Technology Facilities Council (STFC)
- Science Foundation Ireland
- NSF Graduate Research program
- Stanford Graduate program
- NDSEG program
- NASA
- Fundacao para a Ciencia e a Tecnologia
- Kavli Institute for Cosmological Physics [NSF PHY-0114422]
- STFC [PP/D001048/1, PP/D509552/1, ST/G001979/1, ST/G002711/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G001979/1, PP/D509552/1] Funding Source: researchfish
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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 degrees +/- 0.82 degrees (random) +/- 0.5 degrees (systematic) using QUaD's 100 and 150 GHz temperature-curl and gradient-curl spectra over the spectra over the multipole range 200
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