http://arxiv.org/abs/2109.01760
The $\rm\Lambda$CDM cosmological model is remarkable: with just 6 parameters it describes the evolution of the Universe from a very early time when all structures were quantum fluctuations on subatomic scales to the present, and it is consistent with a wealth of high-precision data, both laboratory measurements and astronomical observations. However, the foundation of $\rm\Lambda$CDM involves physics beyond the standard model of particle physics: particle dark matter, dark energy and cosmic inflation. Until this `new physics’ is clarified, $\rm\Lambda$CDM is at best incomplete and at worst a phenomenological construct that accommodates the data. I discuss the path forward, which involves both discovery and disruption, some grand challenges and finally the limits of scientific cosmology.
M. Turner
Tue, 7 Sep 21
45/89
Comments: Proceedings of the Lemaitre Workshop on Black Holes, Gravitational Waves and Space Time Singularities, published in Foundations of Physics (2018)