Conveners
Saturday 4
- Ke-Pan Xie (Beihang University)
Gravitational waves offer a unique probe to the early Universe. A particularly interesting scenario is that of a first-order phase transition, in which bubbles of true vacuum nucleate, expand, and collide, involving the dynamics of surrounding plasma particles. In this talk, we introduce the Higgsless scheme for numerical simulations of sound waves and the resulting gravitational wave...
I will briefly review the fluid equations needed to compute the wall velocity from first principles. As a concrete example, I will apply these equations to the singlet scalar extension of the Standard Model. The solutions obtained can naturally be classified as deflagration/hybrid walls ($v_w \sim c_s$) or ultrarelativistic detonations. In the second part, I will explain how this calculation...
The detection of stochastic gravitational wave backgrounds from cosmological first-order phase transitions (FOPT) is a promising probe for new physics beyond the standard model of particle physics. However, the terminal wall velocity as one of the key parameters has been largely left undetermined thanks to its intimate relation to the non-equilibrium nature of FOPT near the bubble wall. In...
