标题： 宇宙学选择小弱尺度从大真空能：一种最小方法 显示英文标题

标题： Cosmological selection of a small weak scale from large vacuum energy: a minimal approach

摘要： 我们提出了一种最小的宇宙学解决方案来解决层次问题。 我们的模型除了标准模型的场内容外，还包括一个轻的赝标量和一个额外的希格斯二重态。 我们考虑了一个真空的景观，其中电弱真空期望值（VEV）的值各不相同。 在我们的模型中，真空能量在电弱VEV非零且远小于截断值的景观区域达到峰值。 在暴胀期间，由于指数膨胀，这些具有最大真空能的区域在体积上主导了宇宙，从而解释了电弱尺度相对于截断值的小性。 我们模型中的赝标量势是完全一般的伪戈德斯通玻色子$-$，不需要钟表机制$-$，其场值永远不会超过其衰变常数或普朗克尺度。 我们的机制对于景观中其他模型参数的变化以及电弱VEV的变化都是稳健的。 它还预测了不同希格斯玻色子质量本征态的质量和耦合之间的精确且可证伪的关系。 此外，我们模型中的赝标量可以解释观测到的暗物质残留密度。 显示英文摘要

摘要： We present a minimal cosmological solution to the hierarchy problem. Our model consists of a light pseudoscalar and an extra Higgs doublet in addition to the field content of the Standard Model. We consider a landscape of vacua with varying values of the electroweak vacuum expectation value (VEV). The vacuum energy in our model peaks in a region of the landscape where the electroweak VEV is non-zero and much smaller than the cutoff. During inflation, due to exponential expansion, such regions of the landscape with maximal vacuum energy, dominate the universe in volume, thus explaining the smallness of the electroweak scale with respect to the cutoff. The pseudoscalar potential in our model is that of a completely generic pseudogoldstone boson$-$not requiring the clockwork mechanism$-$and its field value never exceeds its decay constant or the Planck scale. Our mechanism is robust to the variation of other model parameters in the landscape along with the electroweak VEV. It also predicts a precise and falsifiable relationship between the masses and couplings of the different Higgs boson mass-eigenstates. Moreover, the pseudoscalar in our model can account for the observed dark matter relic density.