Constraints on multifield inflation from the BOSS galaxy survey
Constraints on multifield inflation from the BOSS galaxy survey
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DOI：
10.1103/physrevd.106.043506
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发表时间：
2022-04
影响因子：
5
通讯作者：
G. Cabass;M. Ivanov;O. Philcox;Marko Simonovi'c;M. Zaldarriaga
中科院分区：
文献类型：
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作者：
G. Cabass;M. Ivanov;O. Philcox;Marko Simonovi'c;M. Zaldarriaga
我们使用红移空间星系聚类数据从BOSS调查约束本地原始非高斯性（LPNG）。由于一致性关系，这一点特别重要，这意味着LPNG的检测将排除常规模型中的所有单场。我们的约束条件是基于一致的分析红移空间星系功率谱和双谱，从公共BOSS数据与最佳无窗估计。我们使用一个完整的微扰理论模型，包括所有的单回路功率谱校正产生的LPNG。我们对局部非高斯形状的振幅的限制是f localNL = − 33 ± 28，在68% CL，没有产生原始非高斯性的证据。双谱的加入使BOSS的f localNL约束收紧了20%，并允许在非高斯星系偏置的情况下打破简并。这些结果为未来调查的分析奠定了基础，其更大的数量将对LPNG产生更严格的约束。
We use redshift-space galaxy clustering data from the BOSS survey to constrain local primordial non-Gaussianity (LPNG). This is of particular importance due to the consistency relations, which imply that a detection of LPNG would rule out all single-field inflationary models. Our constraints are based on the consistently analyzed redshift-space galaxy power spectra and bispectra, extracted from the public BOSS data with optimal window-free estimators. We use a complete perturbation theory model including all one-loop power spectrum corrections generated by LPNG. Our constraint on the amplitude of the local non-Gaussian shape is f localNL = − 33 ± 28 at 68% CL, yielding no evidence for primordial non-Gaussianity. The addition of the bispectrum tightens the f localNL constraints from BOSS by 20%, and allows breaking of degeneracies with non-Gaussian galaxy bias. These results set the stage for the analysis of future surveys, whose larger volumes will yield significantly tighter constraints on LPNG.