论文标题
标准模型中CMB调制的新型机制
Novel mechanism for CMB modulation in the Standard Model
论文作者
论文摘要
我们证明，即使在没有直接耦合到充气量的情况下，光观众场可以通过调制加热来源。当观众调制了为衰减产物产生质量的观众调节加速器衰减的相位空间时，就会产生效果。我们称之为机制\ textit {间接调制}，并表明它可以驱动扰动，甚至比观察到的四个数量级。重要的是，间接机制存在于用右手中微子扩展的标准模型中。对于最小耦合的希格斯玻色子，这会导致在四分之一的耦合上进行新的下限，并将中微子Yukawas限制在统一以下。
We demonstrate that light spectator fields can source sizeable CMB anisotropies through modulated reheating even in the absence of direct couplings to the inflaton. The effect arises when the phase space of the inflaton decay is modulated by the spectator which generates masses for the decay products. We call the mechanism \textit{indirect modulation} and show that it can source perturbations even four orders of magnitude larger than the observed. Importantly, the indirect mechanism is present in the Standard Model extended with right-handed neutrinos. For a minimally coupled Higgs boson this leads to a novel lower bound on the quartic coupling and constrains the neutrino Yukawas below unity.
