mo- tivated source of such primordial waves (e.g. [4-7], it is important to demonstrate that other possible sources cannot account for the current BICEP2 data before def- initely claiming Inflation has been proved. A surprisingly large value of r, the ratio of power in tensor modes to scalar density

lar- ization of the cosmic microwave background radiation by the BICEP2 collaboration. In order for the primordial B-mode signal to be observable by BICEP2, the energy scale of inflation must be high. lint x 2 x 1016 GeV. Higgs Inflation generally predicts a small amplitude of tensor perturbations. and

mo- tivated source of such primordial waves (e.g. [4-7], it is important to demonstrate that other possible sources cannot account for the current BICEP2 data before def- initely claiming Inflation has been proved. A surprisingly large value of r, the ratio of power in tensor modes to scalar density