论文标题
壁速和形状在单线辅助强的Electroweak相变
Wall speed and shape in singlet-assisted strong electroweak phase transitions
论文作者
论文摘要
与希格斯耦合的单线场的模型可以实现强烈的一阶电子相变，该相位引起了重力生成和重力波的感兴趣。我们改善了以前的尝试在具有$ z_2 $ - symmetric Singlet电位的高度预测性的型号中，试图为气泡墙属性（Wall Speed $ v_w $ and Shape）提高了尝试。在亚音速壁的情况下，实施了一种新的算法来确定$ v_w $和整个Singlet参数空间的墙壁概况，重点是具有足够强的相变的模型，以满足SphaLeron Washout的限制。我们发现在参数空间上的扫描中，我们发现速度低至$ v_w \ cong 0.1 $，而单元必须相对较轻才能具有亚音速墙，$ m_s \ lyssim 135 $ gev。
Models with singlet fields coupling to the Higgs can enable a strongly first order electroweak phase transition, of interest for baryogenesis and gravity waves. We improve on previous attempts to self-consistently solve for the bubble wall properties -- wall speed $v_w$ and shape -- in a highly predictive class of models with $Z_2$-symmetric singlet potentials. A new algorithm is implemented to determine $v_w$ and the wall profiles throughout the singlet parameter space in the case of subsonic walls, focusing on models with strong enough phase transitions to satisfy the sphaleron washout constraint for electroweak baryogenesis. We find speeds as low as $v_w \cong 0.1$ in our scan over parameter space, and the singlet must be relatively light to have a subsonic wall, $m_s \lesssim 135$ GeV.
