Hubble Hullabaloo and String Cosmology

Abstract

The discrepancy in measurements of the Hubble constant indicates new physics in dark energy, dark matter, or both. Drawing inspiration from string theory, we explore possible solutions to overcome the $H_0$ problem. We investigate the interplay between the cosmological determination of $\Delta N_{\mathrm{eff}}$ and $Z^{\prime }$ searches at the LHC Run3.

Based on a talk given at the Phenomenology 2020 Symposium, University of Pittsburgh, 4-6 May 2020

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