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Imprints of quantum gravity in the cosmic microwave background

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Article number238
<mark>Journal publication date</mark>15/03/2019
<mark>Journal</mark>European Physical Journal B
Issue number3
Volume79
Number of pages5
Publication statusPublished
Early online date15/03/19
Original languageEnglish

Abstract

It has been shown that the spectrum of quantum gravity contains at least two new modes in addition to the massless graviton: a massive spin-0 and a massive spin-2. We calculate their power spectrum during inflation and we argue that they could leave an imprint in the cosmic microwave background should their masses be below the inflationary scale.