Browsing by Author "Barreira, A."
Now showing 1 - 1 of 1
Results Per Page
Sort Options
Item A comparison of Einstein-Boltzmann solvers for testing General Relativity(American Physical Society, 2018) Bellini, Emilio; Barreira, A.; Frusciante, N.; Ballardini, M.We compare Einstein-Boltzmann solvers that include modifications to General Relativity and find that, for a wide range of models and parameters, they agree to a high level of precision. We look at three general purpose codes that primarily model general scalar-tensor theories, three codes that model Jordan-Brans-Dicke (JBD) gravity, a code that models f (R) gravity, a code that models covariant Galileons, a code that models Hoˇrava- Lifschitz gravity and two codes that model non-local models of gravity. Comparing predictions of the angular power spectrum of the cosmic microwave background and the power spectrum of dark matter for a suite of different models, we find agreement at the sub-percent level. This means that this suite of Einstein-Boltzmann solvers is now sufficiently accurate for precision constraints on cosmological and gravitational parameters.