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arxiv 1312.6646 v2 pith:G7LFLVJK submitted 2013-12-23 astro-ph.CO

Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR experiment

POLARBEAR Collaboration , P.A.R. Ade , Y. Akiba , A.E. Anthony , K. Arnold , M. Atlas , D. Barron , D. Boettger
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J. Borrill S. Chapman Y. Chinone M. Dobbs T. Elleflot J. Errard G. Fabbian C. Feng D. Flanigan A. Gilbert W. Grainger N.W. Halverson M. Hasegawa K. Hattori M. Hazumi W.L. Holzapfel Y. Hori J. Howard P. Hyland Y. Inoue G.C. Jaehnig A. Jaffe B. Keating Z. Kermish R. Keskitalo T. Kisner M. Le Jeune A.T. Lee E. Linder E. M. Leitch M. Lungu F. Matsuda T. Matsumura X. Meng N.J. Miller H. Morii S. Moyerman M.J. Myers M. Navaroli H. Nishino H. Paar J. Peloton E. Quealy G. Rebeiz C.L. Reichardt P.L. Richards C. Ross I. Schanning D.E. Schenck B. Sherwin A. Shimizu C. Shimmin M. Shimon P. Siritanasak G. Smecher H. Spieler N. Stebor B. Steinbach R. Stompor A. Suzuki S. Takakura T. Tomaru B. Wilson A. Yadav O. Zahn
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keywords lensingmatterpolarizationmodesignalbackgroundcosmicdistribution
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Gravitational lensing due to the large-scale distribution of matter in the cosmos distorts the primordial Cosmic Microwave Background (CMB) and thereby induces new, small-scale $B$-mode polarization. This signal carries detailed information about the distribution of all the gravitating matter between the observer and CMB last scattering surface. We report the first direct evidence for polarization lensing based on purely CMB information, from using the four-point correlations of even- and odd-parity $E$- and $B$-mode polarization mapped over $\sim30$ square degrees of the sky measured by the POLARBEAR experiment. These data were analyzed using a blind analysis framework and checked for spurious systematic contamination using null tests and simulations. Evidence for the signal of polarization lensing and lensing $B$-modes is found at 4.2$\sigma$ (stat.+sys.) significance. The amplitude of matter fluctuations is measured with a precision of $27\%$, and is found to be consistent with the Lambda Cold Dark Matter ($\Lambda$CDM) cosmological model. This measurement demonstrates a new technique, capable of mapping all gravitating matter in the Universe, sensitive to the sum of neutrino masses, and essential for cleaning the lensing $B$-mode signal in searches for primordial gravitational waves.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth

    astro-ph.CO 2023-04 accept novelty 6.0

    ACT DR6 yields a 2.3% precise CMB lensing power spectrum with A_lens = 1.013 ± 0.023 relative to Planck 2018 Lambda CDM, giving S8 = 0.818 ± 0.022 and no evidence for suppressed structure growth.

  2. CMB Lensing Reconstruction Using Two Years of Temperature Data from the SPT-3G Summer Survey

    astro-ph.CO 2026-07 conditional novelty 5.0

    First CMB lensing reconstruction from two years of SPT-3G Summer temperature data yields A_comb = 1.015 ± 0.053 over 50 < L < 2000, consistent with Planck 2018 ΛCDM.

  3. Detectors for CLASS-W2: The second 90 GHz telescope of the Cosmology Large Angular Scale Surveyor

    astro-ph.IM 2026-06 accept novelty 3.0

    A new 296-detector 90 GHz TES bolometer array for CLASS achieves uniform properties, 16 μK√s NET, 0.37 optical efficiency, and a 41% mapping speed boost after addressing blue-leak radiation.