Speaker
Description
The observation of stochastic gravitational wave backgrounds from first-order phase transitions in the early Universe is promising to become a feasible test for high energy physics. In this talk, I will show how observable signals can be obtained from strong first-order phase transitions in a dark sector. If the dark sector is initially without thermal contact to the particle species of the Standard Model (SM), it can possibly have a higher temperature than the SM bath during the phase transition which will, in turn result in more energy being emitted in the form of gravitational radiation. However, the resulting signals will be diluted by the entropy injected into the SM bath when the dark sector decays. To illustrate these competing effects, I will consider a U(1) extension to the SM that allows for a phase transition testable with LISA and the Einstein Telescope.
| Do you wish to attend the workshop on-site? | yes |
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