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T: Fachverband Teilchenphysik

T 110: Topical Workshop: Gravitational Waves and Particle Physics

T 110.2: Eingeladener Vortrag

Donnerstag, 30. März 2017, 17:15–17:45, H 4

Bubble wall dynamics - from friction to runaway — •Dietrich Bödeker — Bielefeld

In a first order electroweak phase transition bubbles of Higgs phase expand into the symmetric phase. Particles hitting a bubble wall cause friction and slow down the expansion. In some models this can be insufficient to compensate the pressure difference between the two phases. Then the bubble wall accelerates indefinitely, it 'runs away'. When two such bubbles collide, they can produce a large gravitational wave signal. The particles hitting the wall can emit radiation, causing additional friction which can prevent runaway.