Conveners
Plenary 6
- Adam Falkowski
Alternative Titles:
1:Vaccum Decay: Bounces, Antibounces and Pseudo-bounces
2:Exploring Vacuum Decay Valleys
In the standard lore the decay of the false vacuum of a single-field potential is
described by a semi-classical Euclidean bounce configuration that can be found using
overshoot/undershoot algorithms, and whose action suppresses exponentially the decay
rate. While this...
We compute for the first time baryon number violation at zero temperature from Higgs bubble collisions and find that it can be of the same order as that from thermal sphalerons in the symmetric phase at electroweak temperatures. We study the dependence of the rate of Chern--Simons number transitions on the shape of the scalar potential and on the Lorentz factor of the bubble walls at collision...
A first-order Electroweak Phase Transition (FOEWPT) could explain the observed baryon-antibaryon asymmetry of the Universe, and its dynamics could yield a detectable gravitational wave signature, while the underlying physics would be within the reach of colliders. The Standard Model, however, predicts a crossover transition, so any hope of having a FOEWPT hinges on physics beyond the Standard...
Supercooled cosmological phase transitions typically yield a strong gravitational-wave background, potentially detectable, e.g. in LISA. The scenario of supercooling is naturally realised in models with classical scale invariance, where symmetry is broken radiatively. I will review the phenomenology of the supercooled phase transition and explain how to properly compute the bubble nucleation...
