论文标题
爱因斯坦 - 加斯 - 邦纳特重力领域中金石通胀的研究
Study of Goldstone Inflation in the domain of Einstein-Gauss-Bonnet gravity
论文作者
论文摘要
意识到由伪-Nambu Goldstone Boson（PNGB）驱动的通货膨胀时期可以确保令人垂涎的平坦度，以及与范式动力学相关的亚平峰尺度。在这项工作中，我们采用了这种情况的最通用形式：\ cite {croon}提出的金石通胀，并研究了爱因斯坦 - 加斯 - 邦纳特重力中的模型。自然通货膨胀是此模型的限制案例。 EGB耦合的特定形式为研究与通货膨胀以及加热时期相关的丰富现象学提供了充足的机会。通货膨胀可观察到的预测值，张量与标量比（$ r $）和光谱指数（$ n_s $）与$ Planck'18 $ \ cite {planck2018}的最新观察值非常吻合。因此，在EGB的框架中，一个人可以复活该模型，否则，该模型需要在\ cite {bhattacharya：2018xlw}中研究的规范域中进行微调或转移，以在标准的冷膨胀情景中生存。最后，研究了重新加热的时代，以进行不同的模型参数选择。
Realizing the inflationary epoch driven by a pseudo-Nambu Goldstone boson (pNGB) could ensure the coveted flatness, and the sub-Planckian scales related to the dynamics of the paradigm. In this work, we have taken the most general form of such a scenario: Goldstone inflation proposed in \cite{croon}, and studied the model in Einstein-Gauss-Bonnet gravity. Natural inflation is a limiting case of this model, is also studied here. The specific form of the EGB coupling gives ample opportunity to study the rich phenomenology associated with inflation as well as the reheating epoch. Predicted values of the inflationary observables, tensor to scalar ratio ($r$), and spectral index ($n_s$) are in good agreement with the recent observations from $Planck'18$ \cite{Planck2018}. Thus, in the framework of EGB one can resurrect the model, which otherwise needs quite a bit of fine tuning or diversion from the canonical domain as studied in \cite{Bhattacharya:2018xlw}, to survive in the standard cold inflationary scenario. Finally, the era of reheating is studied for different choice of model parameters.
