Towards an all-orders calculation of the electroweak bubble wall velocity

By S. Höche, J. Kozaczuk, A. J. Long, J. Turner, Yikun Wang. Journal of Cosmology and Astroparticle Physics, 2020

135 citations recorded by the source corpus.

We analyze Higgs condensate bubble expansion during a first-order electroweak phase transition in the early Universe. The interaction of particles with the bubble wall can be accompanied by the emission of multiple soft gauge bosons. When computed at fixed order in perturbation theory, this process exhibits large logarithmic enhancements which must be resummed to all orders when the wall velocity is large. We perform this resummation both analytically and numerically at leading logarithmic accuracy. The numerical simulation is achieved by means of a particle shower in the broken phase of the electroweak theory. The two approaches agree to the 10% level. For fast-moving walls, we find the scaling of the thermal pressure exerted against the wall to be P~γ2T4, independent of the particle masses, implying a significantly slower terminal velocity than previously suggested.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/314d1758ea27a67c59793fb35bd8b560078b1f1e

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In Astronomy and Astrophysics

1. Marek Lewicki
2. John Ellis
3. V. Vaskonen
4. D. Bodeker
5. A. Azatov
6. M. Vanvlasselaer
7. W. Buchmuller
8. J. No

In Nuclear and High Energy Physics

1. John Ellis
2. Marek Lewicki
3. D. Bodeker
4. M. Vanvlasselaer
5. A. Azatov
6. V. Vaskonen
7. W. Buchmuller
8. M. Drewes

Citations in the corpus

• Baryogenesis from the weak scale to the grand unification scale (2020, background): “However, additional radiation off the particles passing the wall leads to a speed limit (Bodeker and Moore, 2017; Höche et al., 2020).”
• Bubble wall velocity: heavy physics effects (2020, background): “The resulting friction pressure for the fermion emitting soft vector bosons was found to scale as P [41] ∼ αγ(2)T (4).”
• Updated predictions for gravitational waves produced in a strongly supercooled phase transition (2020, methodology): “on [52{59]. In particular, there has recently been a signicant advance in the estimation of the scaling of the friction, P, encountered by the wall with its Lorentz factor, with the result that P/ 2 [59], to be contrasted with the previous estimate [56] that P/ . This change in the scaling law has a”