Cosmological phase transitions in warped space: gravitational waves and collider signatures Megías Fernández, Eugenio Nardini, Germano Quirós, Mariano Beyond Standard Model Cosmology of Theories beyond the SM Field theories in higher dimensions We study the electroweak phase transition within a 5D warped model including a scalar potential with an exponential behavior, and strong back-reaction over the metric, in the infrared. By means of a novel treatment of the superpotential formalism, we explore parameter regions that were previously inaccessible. We nd that for large enough values of the t'Hooft parameter (e.g. N = 25) the holographic phase transition occurs, and it can force the Higgs to undergo a rst order electroweak phase transition, suitable for electroweak baryogenesis. The model exhibits gravitational waves and colliders signatures. It typically predicts a stochastic gravitational wave background observable both at the Laser Interferometer Space Antenna and at the Einstein Telescope. Moreover the radion tends to be heavy enough such that it evades current constraints, but may show up in future LHC runs. 2019-11-14T09:16:13Z 2019-11-14T09:16:13Z 2018-09-17 journal article Megías, E., Nardini, G., & Quirós, M. (2018). Cosmological phase transitions in warped space: gravitational waves and collider signatures. Journal of High Energy Physics, 2018(9), 95. http://hdl.handle.net/10481/57879 10.1007/JHEP09(2018)095 eng http://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España Springer Nature