Tootfinder

Testing scale-invariant inflation against cosmological data
Chiara Cecchini, Mariaveronica De Angelis, William Giar\`e, Massimiliano Rinaldi, Sunny Vagnozzi
https://arxiv.org/abs/2403.04316

Testing scale-invariant inflation against cosmological data
There is solid theoretical and observational motivation behind the idea of scale-invariance as a fundamental symmetry of Nature. We consider a recently proposed classically scale-invariant inflationary model, quadratic in curvature and featuring a scalar field non-minimally coupled to gravity. We go beyond earlier analytical studies, which showed that the model predicts inflationary observables in qualitative agreement with data, by solving the full two-field dynamics of the system -- this allo…