CMB Polarization: Recent BICEP2 and POLARBEAR Measurement

The cosmic microwave background CMB radiation is uniquely important as a probe of the nature structure and evolution of the universe Small perturbations in the intensity and polarization of the CMB that were induced in the very early universe have already been extensively measured by three cosmology satellites and a host of ground based and stratospheric projects The odd parity B mode polarization of the CMB can only be produced by primordial inflationary induced gravitational waves or by conversion of the even parity E mode to B mode via gravitational lensing induced