Figures of Merit for Testing Standard Models: Application to Dark Energy Experiments in Cosmology - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




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Abstract: Given a standard model to test, an experiment can be designed to: i measurethe standard model parameters; ii extend the standard model; or iii lookfor evidence of deviations from the standard model. To measure or extend thestandard model, the Fisher matrix is widely used in cosmology to predictexpected parameter errors for future surveys under Gaussian assumptions. Inthis article, we present a frame- work that can be used to design experimentssuch that it maximises the chance of finding a deviation from the standardmodel. Using a simple illustrative example, discussed in the appendix, we showthat the optimal experimental configuration can depend dramatically on theoptimisation approach chosen. We also show some simple cosmology calculations,where we study Baryonic Acoustic Oscillation and Supernove surveys. In doingso, we also show how external data, such as the positions of the CMB peaksmeasured by WMAP, and theory priors can be included in the analysis. In thecosmological cases that we have studied DETF Stage III, we find that thethree optimisation approaches yield similar results, which is reassuring andindicates that the choice of optimal experiment is fairly robust at this level.However, this may not be the case as we move to more ambitious future surveys.



Autor: Adam Amara, Thomas Kitching

Fuente: https://arxiv.org/







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