论文标题
迈向电动气泡壁速度的全端口计算
Towards an all-orders calculation of the electroweak bubble wall velocity
论文作者
论文摘要
我们分析了希格斯在早期宇宙中的一阶电子相变期间凝结气泡膨胀。颗粒与气泡壁的相互作用可以伴随着多个软规玻色子的发射。当在扰动理论中以固定顺序计算时，该过程表现出较大的对数增强功能，当壁速度较大时，必须重新定位到所有顺序。我们以领先的对数准确性在分析和数值上进行重新召集。数值模拟是通过粒子淋浴在电片理论的破碎相中实现的。这两种方法同意10 \％的水平。对于快速移动的壁，我们发现在壁上施加的热压的比例为$ p \ simγ^2t^4 $，与粒子无关，这意味着末端速度明显慢得多。
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 $P\sim γ^2T^4$, independent of the particle masses, implying a significantly slower terminal velocity than previously suggested.
