arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.01709astro-ph.COgr-qchep-th
收藏

关于准单场暴胀的有效场论

On the Effective Field Theory for Quasi-Single Field Inflation

Xi Tong, Yi Wang, Siyi Zhou

摘要:

研究了准单场暴胀中虚粒子效应的有效场论描述,统一了大质量和大混合情况下的结果。利用水平交叉近似和已知极限的匹配,得到了功率谱和谱指数的近似表达式。近似解的误差在参数空间的主要部分在10%以内,这对应于$n_s$ - $r$图中小于0.1%的误差。对几个暴胀模型,在$n_s$ - $r$图上画出了准单场修正。特别地,准单场校正将$m^2ϕ^2$暴胀驱动到$n_s$ - $r$图上的最佳拟合区域,具有可以在未来实验中测试的等边非高斯性的量。

英文摘要:

We study the effective field theory (EFT) description of the virtual particle effects in quasi-single field inflation, which unifies the previous results on large mass and large mixing cases. By using a horizon crossing approximation and matching with known limits, approximate expressions for the power spectrum and the spectral index are obtained. The error of the approximate solution is within 10% in dominate parts of the parameter space, which corresponds to less-than-0.1% error in the $n_s$-$r$ diagram. The quasi-single field corrections on the $n_s$-$r$ diagram are plotted for a few inflation models. Especially, the quasi-single field correction drives $m^2ϕ^2$ inflation to the best fit region on the $n_s$-$r$ diagram, with an amount of equilateral non-Gaussianity which can be tested in future experiments.

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。

↑