Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment

(POLARBEAR Collaboration)

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Using only cosmic microwave background polarization data from the polarbear experiment, we measure B-mode polarization delensing on subdegree scales at more than 5σ significance. We achieve a 14% B-mode power variance reduction, the highest to date for internal delensing, and improve this result to 22% by applying for the first time an iterative maximum a posteriori delensing method. Our analysis demonstrates the capability of internal delensing as a means of improving constraints on inflationary models, paving the way for the optimal analysis of next-generation primordial B-mode experiments.

Original languageEnglish
Article number131301
JournalPhysical Review Letters
Volume124
Issue number13
DOIs
Publication statusPublished - Apr 3 2020
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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