# Generalized slow roll for tensor fluctuations

@article{Hu2014GeneralizedSR, title={Generalized slow roll for tensor fluctuations}, author={Wayne Hu}, journal={Physical Review D}, year={2014}, volume={89} }

The recent BICEP2 detection of degree scale CMB B-mode polarization, coupled with a deficit of observed power in large angle temperature anisotropy, suggest that the slow-roll parameter $\epsilon_H$, the fractional variation in the Hubble rate per efold, is both relatively large and may evolve from an even larger value on scales greater than the horizon at recombination. The relatively large tensor contribution implied also requires finite matching features in the tensor power spectrum for any… CONTINUE READING

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