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arXiv 1709.07014hep-thastro-ph.COgr-qchep-ph
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强耦合下的单值暴胀:天空中的$4π$

Monodromy inflation at strong coupling: $4π$ in the sky

Guido D'Amico, Nemanja Kaloper, Albion Lawrence

摘要:

我们提出了一个简单的有效场论制定的一般家庭的单场通量monodromy模型,在大的字段值的强耦合效应可以平坦的潜在和激活运营商具有更高的权力的衍生物。这些模型是辐射和非微扰稳定的,可以很容易地维持膨胀的$\ga 60$倍。该动力学结合了大场混沌暴胀和$k$ -暴胀的特点,两者都可以抑制张量振幅。将张量-标量比降低到观测界$r \lesssim 0.1$以下,同时将标量谱指数$n_s$保持在实验界内,要么产生等边非高斯性$f_{NL}^{eq} \simeq {\cal O}(1)$,接近当前的观测界,要么最终产生非常小的$r$。

英文摘要:

We present a simple effective field theory formulation of a general family of single field flux monodromy models for which strong coupling effects at large field values can flatten the potential and activate operators with higher powers of derivatives. These models are radiatively and non-perturbatively stable and can easily sustain $\ga 60$ efolds of inflation. The dynamics combines features of both large field chaotic inflation and $k$-inflation, both of which can suppress the tensor amplitude. Reducing the tensor-scalar ratio below the observational bound $r \lesssim 0.1$ while keeping the scalar spectral index $n_s$ within experimental bounds either yields equilateral nongaussianity $f_{NL}^{eq} \simeq {\cal O}(1)$, close to the current observational bounds, or ultimately gives very small $r$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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