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Effective Planck Mass and the Scale of Inflation

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arxiv 1508.01527 v3 pith:AHLVD2IQ submitted 2015-08-06 hep-th astro-ph.CO

Effective Planck Mass and the Scale of Inflation

classification hep-th astro-ph.CO
keywords inflationscalemassalteredamplitudearguedargumentbackground
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A recent paper argued that it is not possible to infer the energy scale of inflation from the amplitude of tensor fluctuations in the Cosmic Microwave Background, because the usual connection is substantially altered if there are a large number of universally coupled fields present during inflation, with mass less than the inflationary Hubble scale. We give a simple argument demonstrating that this is incorrect.

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