https://doi.org/10.1140/epjc/s10052-019-6756-x
Regular Article - Theoretical Physics
Imprints of quantum gravity in the cosmic microwave background
1
Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH, UK
2
Lancaster University, Lancaster, LA1 4YW, UK
* e-mail: ibere.kuntz@sussex.ac.uk
Received:
2
February
2019
Accepted:
4
March
2019
Published online:
15
March
2019
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.
© The Author(s), 2019
