标题： 电弱相变在两个希格斯二重态模型中 显示英文标题

标题： Electroweak Phase Transition in Two Higgs Doublet Models

摘要： 我们重新审视在额外希格斯二重态补充的电弱理论中一阶相变的强度。 有限温度有效势，$V_{eff}$，被计算到一环阶，包括环图的求和，以研究希格斯场真空期望值与临界温度的比值$\phi_c/T_c$。 我们对之前的处理进行了多项改进，包括在$V_{eff}$中对戈德斯通玻色子的一致处理，对$V_{eff}$的准确解析近似，适用于任何质量与温度比，以及使用实验测量的顶夸克质量。 对于两希格斯二重态模型，我们确定了一个参数空间的重要区域，其中$\phi_c/T_c$足够大以实现电弱重子生成，我们认为即使在微扰理论的更高阶中，这种识别也应该成立。 在最小超对称标准模型的情况下，我们的结果表明额外的希格斯玻色子对相变强度影响很小。 显示英文摘要

摘要： We reexamine the strength of the first order phase transition in the electroweak theory supplemented by an extra Higgs doublet. The finite-temperature effective potential, $V_{eff}$, is computed to one-loop order, including the summation of ring diagrams, to study the ratio $\phi_c/T_c$ of the Higgs field VEV to the critical temperature. We make a number of improvements over previous treatments, including a consistent treatment of Goldstone bosons in $V_{eff}$, an accurate analytic approximation to $V_{eff}$ valid for any mass-to-temperature ratios, and use of the experimentally measured top quark mass. For two-Higgs doublet models, we identify a significant region of parameter space where $\phi_c/T_c$ is large enough for electroweak baryogenesis, and we argue that this identification should persist even at higher orders in perturbation theory. In the case of the minimal supersymmetric standard model, our results indicate that the extra Higgs bosons have little effect on the strength of the phase transition.