We explore the prospects for direct detection of dark energy by current and upcoming terrestrial dark matter direct detection experiments. If dark energy is driven by a new light degree of freedom coupled to matter and photons then dark energy quanta …
Last year (June 2020), there has been a lot of excitement and speculation around the excess reported by the XENON-1T collaboration, which could be attributed to new physics such as the axion. I recently worked on the bold idea that a specific model of dark energy could have caused such an excess.
Dynamical dark energy, screened fields, cosmological tensions, and precision tests of cosmic acceleration.
We consider a quintessence field which transitions from a matter-like to a cosmological constant behaviour between recombination and the present time. We aim at easing the tension in the measurement of the present Hubble rate, and we assess the …
The low-energy limit of several string theories feature the axiverse, a plethora of light axions with masses spanning various orders of magnitude. Within the simplest picture, the masses of the resulting axions depend on a hard non-perturbative scale …