"ins1286113_resources.tar.gz" of "BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales" ...

• Main Author: BICEP2 Collaboration
• Format: Article in Journal/Newspaper
• Language: English
• Published: HEPData 2014
• Subjects: South Pole; South pole
• Online Access: https://dx.doi.org/10.17182/hepdata.62706.v1/r1; https://www.hepdata.net/record/resource/99931?landing_page=true

ins1286113_resources.tar.gz (unpack then view insert.html) ... : BICEP2. Results are reported from the BICEP2 experiment, a Cosmic Microwave Background (CMB) polarimeter specifically designed to search for the signal of inflationary gravitational waves in the B-mode power spectrum around angular multipole ~ 80. BICEP2 observed from the South Pole for three seasons from 2010 to 2012. An excess of B-mode power over the base lensed-LambdaCDM expectation is found in the range 30 < multipole < 150, inconsistent with the null hypothesis at a significance of > 5 sigma. The observed B-mode power spectrum is well-fit by a lensed-LambdaCDM + tensor theoretical model with tensor/scalar ratio r = 0.20 +0.07,-0.05, with r = 0 disfavoured at 7.0 sigma. Subtracting the best available estimate for foreground dust modifies the likelihood slightly so that r = 0 is disfavoured at 5.9 sigma. ...