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

Adachi, S.; Aguilar Faúndez, M. A.  O.; Akiba, Y.; Ali, A.; Arnold, K.; Baccigalupi, C.; Barron, D.; Beck, D.; Bianchini, F.; Borrill, J.; Carron, J.; Cheung, K.; Chinone, Y.; Crowley, K.; El Bouhargani, H.; Elleflot, T.; Errard, J.; Fabbian, G.; Feng, C.; Fujino, T.; Goeckner-Wald, N.; Hasegawa, M.; Hazumi, M.; Hill, C. A.; Howe, L.; Katayama, N.; Keating, B.; Kikuchi, S.; Kusaka, A.; Lee, A. T.; Leon, D.; Linder, E.; Lowry, L. N.; Matsuda, F.; Matsumura, T.; Minami, Y.; Namikawa, T.; Navaroli, M.; Nishino, H.; Peloton, J.; Pham, A. T.  P.; Poletti, D.; Puglisi, G.; Reichardt, C. L.; Segawa, Y.; Sherwin, B. D.; Silva-Feaver, M.; Siritanasak, P.; Stompor, R.; Tajima, O.; Takatori, S.; Tanabe, D.; Teply, G. P.; Vergès, C.

doi:10.1103/physrevlett.124.131301

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

Journal Article · Wed Apr 01 00:00:00 EDT 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.124.131301· OSTI ID:1616762

;

; Akiba, Y.;

; Arnold, K.;

;

; Bianchini, F.; Borrill, J.;

;

; Feng, C.;

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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); European Research Council (ERC); JSPS KAKENHI; Moore Foundation; Simons Foundation; Templeton Foundation

Contributing Organization:: POLARBEAR Collaboration

Grant/Contract Number:: AC02-76SF00515; AST-0618398; AST-1212230; 77047; 616170; ST/P000525/1; 18K13558; 18H04347; 19H00674; JP26220709; JP15H05891; JP26800125; JP16K21744; JP18H05539; FT150100074; 4633; 034079; 58724; 1130777; 1171811; AC02-05CH11231

OSTI ID:: 1616762

Alternate ID(s):: OSTI ID: 1607960; OSTI ID: 1616130

Journal Information:: Physical Review Letters, Vol. 124, Issue 13; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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References (37)

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

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