{"paper":{"title":"A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Cukierman, A. Ducout, A. Gilbert, A.H. Jaffe, A. Kusaka, A. Suzuki, A.T. Lee, A. T. P. Pham, A. Zahn, B.D. Sherwin, B. Keating, C. Baccigalupi, C. Feng, C. Hill, C.L. Reichardt, C. Ross, C. Tucker, D. Barron, D. Beck, D. Boettger, D. Kaneko, D. Leon, D. Poletti, D. Tanabe, E. Linder, E.M. Leitch, F. Bianchini, F. Matsuda, G.C. Jaehnig, G. Fabbian, G. Hall, G.P. Teply, G. Puglisi, H. Nishino, H. Paar, J. Borrill, J. Errard, J. Groh, J. Montgomery, J. Peloton, K. Arnold, K. Crowley, L. Howe, L. Lowry, M. Aguilar, M. Dobbs, M. Hasegawa, M. Hazumi, M. Le Jeune, M. Navaroli, M. Silva-Feaver, N. Galitzki, N. Goeckner-Wald, N. Katayama, N. Krachmalnicoff, N. Stebor, N.W. Halverson, N. Whitehorn, O. Jeong, O. Tajima, P.L. Richards, P. Siritanasak, R. D\\\"unner, R. Keskitalo, R. Stompor, S. Chapman, S.M. Feeney, S. Takakura, S. Takatori, T. Elleflot, T. Fujino, T. Hamada, The POLARBEAR Collaboration: P.A.R. Ade, T. Kisner, T. Matsumura, T. Tomaru, Y. Akiba, Y. Chinone, Y. Inoue, Y. Minami, Y. Segawa","submitted_at":"2017-05-08T15:06:08Z","abstract_excerpt":"We report an improved measurement of the cosmic microwave background (CMB) $B$-mode polarization power spectrum with the POLARBEAR experiment at 150 GHz. By adding new data collected during the second season of observations (2013-2014) to re-analyzed data from the first season (2012-2013), we have reduced twofold the band-power uncertainties. The band powers are reported over angular multipoles $500 \\leq \\ell \\leq 2100$, where the dominant $B$-mode signal is expected to be due to the gravitational lensing of $E$-modes. We reject the null hypothesis of no $B$-mode polarization at a confidence o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.02907","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}