Improved Measurements of the Temperature and Polarization of the Cosmic Microwave Background from QUaD

We present an improved analysis of the final data set from the QUaD experiment. Using an improved technique
\nto remove ground contamination, we double the effective sky area and hence increase the precision of our cosmic
\nmicrowave background (CMB) power spectrummeasurements by∼30%versus that previously reported. In addition,
\nwe have improved our modeling of the instrument beams and have reduced our absolute calibration uncertainty from
\n5% to 3.5% in temperature. The robustness of our results is confirmed through extensive jackknife tests, and by way
\nof the agreement that we find between our two fully independent analysis pipelines. For the standard six-parameter
\nΛCDM model, the addition of QUaD data marginally improves the constraints on a number of cosmological
\nparameters over those obtained from the WMAP experiment alone. The impact of QUaD data is significantly greater
\nfor a model extended to include either a running in the scalar spectral index, or a possible tensor component, or both.
\nAdding both the QUaD data and the results from the Arcminute Cosmology Bolometer Array Receiver experiment,
\nthe uncertainty in the spectral index running is reduced by∼25% compared toWMAPalone, while the upper limit on
\nthe tensor-to-scalar ratio is reduced fromr < 0.48 tor < 0.33 (95% c.l.). This is the strongest limit on tensors to date
\nfrom the CMBalone.We also use our polarizationmeasurements to place constraints on parity-violating interactions
\nto the surface of last scattering, constraining the energy scale of Lorentz violating interactions to< 1.5×10−43 GeV
\n(68% c.l.). Finally, we place a robust upper limit on the strength of the lensing B-mode signal. Assuming a single flat
\nband power between = 200 and = 2000, we constrain the amplitude of B-modes to be < 0.57μK2 (95% c.l.).