Boost breaking in the EFT of inflation
Boost breaking in the EFT of inflation
复制标题
促进通胀电子转帐的突破
DOI：
10.1088/1475-7516/2017/02/034
复制
发表时间：
2015
影响因子：
6.4
通讯作者：
L. Senatore
中科院分区：
文献类型：
--
作者：
Luca V. Delacrétaz;Toshifumi Noumi;L. Senatore
如果时间转换被自发地打破，那么提升也会被打破。这种对称破缺模式可以通过时间平移的戈德斯通玻色子或与时间平移和提升相关的四个戈德斯通玻色子非线性地实现。本文扩展了多场暴胀的有效场论，考虑了与推进相关的附加戈德斯通玻色子是轻的并且与时间平移的戈德斯通玻色子耦合的情况。对称破断模式迫使耦合到曲率，因此在绝大多数参数空间中，额外的戈德斯通玻色子的质量被预测为等于√2H，因为它们是轻的。因此，这种模式提供了一种在膨胀过程中产生具有哈勃质量的自相互作用粒子的自然方法。在构造一般有效拉格朗日量之后，我们研究了这些粒子如何混合并与曲率波动相互作用，从而产生潜在可检测的非高斯信号。
If time-translations are spontaneously broken, so are boosts. This symmetry breaking pattern can be non-linearly realized by either just the Goldstone boson of time translations, or by four Goldstone bosons associated with time translations and boosts. In this paper we extend the Effective Field Theory of Multifield Inflation to consider the case in which the additional Goldstone bosons associated with boosts are light and coupled to the Goldstone boson of time translations. The symmetry breaking pattern forces a coupling to curvature so that the mass of the additional Goldstone bosons is predicted to be equal to √2H in the vast majority of the parameter space where they are light. This pattern therefore offers a natural way of generating self-interacting particles with Hubble mass during inflation. After constructing the general effective Lagrangian, we study how these particles mix and interact with the curvature fluctuations, generating potentially detectable non-Gaussian signals.