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- W2948274265 abstract "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 $R^2$ gravity -- and show that, during an inflationary period, it leads to fluctuations which, for a particular parameter choice, are almost indistinguishable from normal $R^2$ 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." @default.
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- W2948274265 date "2019-12-11" @default.
- W2948274265 modified "2023-09-25" @default.
- W2948274265 title "Scale-independent <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math> inflation" @default.
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- W2948274265 doi "https://doi.org/10.1103/physrevd.100.123516" @default.
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