text: 294,41,1430803949439930371,1134375290581524480,Kai Schmitz,"New paper on the arXiv, together with Valerie Domcke and @Tevong You: We show how a rolling ""relaxion"" can be trapped by gauge field friction, highlight the importance of Schwinger pair production, and provide a theory motivation for the dark axion portal. <LINK> <LINK>",https://arxiv.org/abs/2108.11295,"The dark axion portal is a coupling of an axion-like particle to a dark photon kinetically mixed with the visible photon. We show how this portal, when applied to the relaxion, can lead to cosmological relaxation of the weak scale using dark photon production. The key backreaction mechanism involves the Schwinger effect: As long as electroweak symmetry is unbroken, Schwinger production of massless Standard Model fermions, which carry dark millicharges, suppresses the dark photon production. Once the electroweak symmetry is broken, the fermions acquire mass and the suppression is lifted. An enhanced dark photon dissipation then traps the relaxion at a naturally small weak scale. Our model thus provides a novel link between the phenomenological dark axion portal, dark photons, and the hierarchy problem of the Higgs mass. ",Cosmological Relaxation through the Dark Axion Portal,1,"['New paper on the arXiv, together with Valerie Domcke and @Tevong You: We show how a rolling ""relaxion"" can be trapped by gauge field friction, highlight the importance of Schwinger pair production, and provide a theory motivation for the dark axion portal. <LINK> <LINK>']",21,08,270