http://arxiv.org/abs/2203.02495
We report an improved measurement of the degree-scale CMB $B$-mode angular power spectrum over 670 square-degree sky area with POLARBEAR. In the original analysis of the data, errors in the angle measurement of the continuously rotating half-wave plate, a polarization modulator, caused significant data loss. By introducing an angle-correction algorithm, the data volume is increased by a factor of 1.8. We report a new analysis using the larger data set. We find the measured $B$-mode spectrum is consistent with the $\Lambda$CDM model with Galactic foregrounds. We place an upper limit on the tensor-to-scalar ratio $r$ < 0.33 at 95% confidence level.
P. Collaboration, S. Adachi, T. Adkins, et. al.
Mon, 7 Mar 22
26/64
Comments: 16 pages, 9 figures, 7 tables, Submitted to ApJ
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