论文标题
大规模结构的有效理论中的两循环双光谱
The two-loop bispectrum in the effective theory of large-scale structure
论文作者
论文摘要
我们研究了eftofls中大规模结构的双光谱，包括校正长达两循环。我们得出了两回路校正的双重限制的分析结果，并表明紫外线敏感性可以被重新归一化的单环双光线的相同四个EFT算子吸收。对于单硬质区域，我们采用简化的处理，引入了一个额外的EFT参数。我们将结果与N体模拟进行了比较，并表明从一环到两环将波数范围扩展到百分比协议从$ k \ simeq 0.08 $到$ 0.15〜h/\ mathrm {mpc} $。
We study the bispectrum of large-scale structure in the EFTofLSS including corrections up to two-loop. We derive an analytic result for the double-hard limit of the two-loop correction, and show that the UV-sensitivity can be absorbed by the same four EFT operators that renormalize the one-loop bispectrum. For the single-hard region, we employ a simplified treatment, introducing one extra EFT parameter. We compare our results to N-body simulations, and show that going from one- to two-loop extends the wavenumber range with percent-level agreement from $k \simeq 0.08$ to $0.15~h/\mathrm{Mpc}$.
