Yuji Chinone, Blake Sherwin, Aritoki Suzuki
The POLARBEAR cosmic microwave background experiment, led by Berkeley, published the first CMB-only detection of CMB B-mode polarization in December and the first measurement of the B-mode power spectrum three weeks ago, on small angular scales from gravitational lensing. A tag team of postdocs will describe the detector and hardware advances that made this possible, the results and their science implications, and future plans for detailed constraints on inflation, dark energy, and neutrino mass.