Abstract
We describe how known matter effects within a well-motivated particle physics framework can explain the dark energy component of the Universe. By considering a cold gas of particles which interact via a vector mediator, we show that there exists a regime where the gas reproduces the dynamics of dark energy. In this regime the screening mass of the mediator is proportional to the number density of the gas, hence we refer to this phenomenon as “the adaptive screening mechanism”. As an example, we argue that such screening mass can result from strong localization of the vector mediators. The proposed dark energy mechanism could be experimentally verified through cosmological observations by the Euclid experiment, as well as by studying properties of dark photons and sterile neutrinos.
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Hektor, A., Marzola, L., Raidal, M. et al. A new mechanism for dark energy: the adaptive screening. J. High Energ. Phys. 2015, 101 (2015). https://doi.org/10.1007/JHEP01(2015)101
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DOI: https://doi.org/10.1007/JHEP01(2015)101