Scale-independent R-2 inflation
Weyl (scale)-invariant theories of scalars and gravity can generate all mass scales spontaneously. In this paper, we study a particularly simple version-scale-invariant R2 gravity-and show that, during an inflationary period, it leads to fluctuations which, for a particular parameter choice, are alm...
| Hlavní autoři: | , , , |
|---|---|
| Médium: | Journal article |
| Vydáno: |
American Physical Society
2019
|
| Shrnutí: | Weyl (scale)-invariant theories of scalars and gravity can generate all mass scales spontaneously. In this paper, we study a particularly simple version-scale-invariant R2 gravity-and show that, during an inflationary period, it leads to fluctuations which, for a particular parameter choice, are almost indistinguishable from normal R2 inflation. Current observations place tight constraints on the primary coupling constant of this theory and predict a tensor to scalar ratio, 0.0033>r>0.0026, which is testable with the next generation of cosmic microwave background experiments. |
|---|