@article{0d8c6392273047c7860acf315faf6022,
title = "Internal Delensing of Cosmic Microwave Background Polarization B-Modes with the POLARBEAR Experiment",
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.",
author = "{(POLARBEAR Collaboration)} and S. Adachi and {Aguilar Fa{\'u}ndez}, {M. A.O.} and Y. Akiba and A. Ali and K. Arnold and C. Baccigalupi and D. Barron and D. Beck and F. Bianchini and J. Borrill and J. Carron and K. Cheung and Y. Chinone and K. Crowley and {El Bouhargani}, H. and T. Elleflot and J. Errard and G. Fabbian and C. Feng and T. Fujino and N. Goeckner-Wald and M. Hasegawa and M. Hazumi and Hill, {C. A.} and L. Howe and N. Katayama and B. Keating and S. Kikuchi and A. Kusaka and Lee, {A. T.} and D. Leon and E. Linder and Lowry, {L. N.} and F. Matsuda and T. Matsumura and Y. Minami and T. Namikawa and M. Navaroli and H. Nishino and J. Peloton and Pham, {A. T.P.} and D. Poletti and G. Puglisi and Reichardt, {C. L.} and Y. Segawa and Sherwin, {B. D.} and M. Silva-Feaver and P. Siritanasak and R. Stompor and S. Takatori",
note = "Funding Information: We thank Antony Lewis for discussion and comments. The POLARBEAR project is funded by the National Science Foundation under Grants No. AST-0618398 and No. AST-1212230. The James Ax Observatory operates in the Parque Astron{\'o}mico Atacama in Northern Chile under the auspices of the Comisi{\'o}n Nacional de Investigaci{\'o}n Cient{\'i}fica y Tecnol{\'o}gica de Chile (CONICYT). J. C. and G. F. are supported by the European Research Council under the European Union{\textquoteright}s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement No. 616170. G. F. also acknowledges the support of the UK STFC Grant No. ST/P000525/1. B. D. S. acknowledges support from an STFC Ernest Rutherford Fellowship. This work was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan. Y. C. acknowledges the support from the JSPS KAKENHI Grants No. 18K13558, No. 18H04347, and No. 19H00674. The Melbourne group acknowledges support from the University of Melbourne and an Australian Research Councils Future Fellowship (FT150100074). The SISSA group acknowledges support from the ASI-COSMOS network and the INDARK INFN Initiative . The analysis presented here was also supported by the Moore Foundation Grant No. 4633, the Simons Foundation Grant No. 034079, and the Templeton Foundation Grant No. 58724. M. Hazumi acknowledges the support from the JSPS KAKENHI Grants No. JP26220709 and No. JP15H05891. H. N. acknowledges the support from the JSPS KAKENHI Grant No. JP26800125. Support from the Ax Center for Experimental Cosmology at UC San Diego is gratefully acknowledged. The APC group acknowledges travel support from Labex UNIVEARTHS. M. A. O. A. F. acknowledges support from CONICYT UC Berkeley-Chile Seed Grant (CLAS fund) No. 77047, Fondecyt Projects No. 1130777 and No. 1171811, DFI postgraduate scholarship program, and DFI Postgraduate Competitive Fund for Support in the Attendance to Scientific Events. N. K. acknowledges the support from JSPS Core-to-Core Program (A. Advanced Research Networks). A. K. acknowledges the support by JSPS Leading Initiative for Excellent Young Researchers (LEADER) and by the JSPS KAKENHI Grants No. JP16K21744 and No. JP18H05539. Work at L. B. N. L. is supported in part by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Contract No. DE-AC02-05CH11231. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, as well as resources of the Central Computing System, owned and operated by the Computing Research Center at KEK. We acknowledge the use of the p y sm , l ens i t , and l ens p ix packages. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = apr,
day = "3",
doi = "10.1103/PhysRevLett.124.131301",
language = "English",
volume = "124",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "13",
}