没有证据表明 BOSS 中存在违反奇偶性的情况

IF 5.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2024-08-25 DOI:10.1088/1475-7516/2024/08/044

Alex Krolewski, Simon May, Kendrick Smith and Hans Hopkins

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引用次数: 0

摘要

最近的研究在 BOSS 光谱星系调查中发现了违反奇偶性的证据，统计意义高达 7σ。这些分析用一种叫做X2的统计量来评估奇偶-偶数四点相关函数（4PCF）的重要性。如果数据的奇偶八点相关函数（8PCF）与模拟星表不同，那么这个统计量就会有偏差。我们构建了新的统计量 X2×、X2null，将奇偶校验违规信号与 8PCF 偏差项分开，使它们能够共同约束。将这些统计量应用于 BOSS，我们发现奇偶校验违规信号的范围从 0 到 2.5σ 不等，这取决于分析选择，而 8PCF 偏差项约为 6σ。我们的结论是，BOSS中没有令人信服的奇偶性违反证据。我们的新统计方法可用于在未来的巡天（如DESI）中寻找没有8PCF偏差的奇偶性违反。

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No evidence for parity violation in BOSS

Recent studies have found evidence for parity violation in the BOSS spectroscopic galaxy survey, with statistical significance as high as 7σ. These analyses assess the significance of the parity-odd four-point correlation function (4PCF) with a statistic called X2. This statistic is biased if the parity-even eight-point correlation function (8PCF) of the data differs from the mock catalogs. We construct new statistics X2×, X2null that separate the parity violation signal from the 8PCF bias term, allowing them to be jointly constrained. Applying these statistics to BOSS, we find that the parity violation signal ranges from 0 to 2.5σ depending on analysis choices, whereas the 8PCF bias term is ~ 6σ. We conclude that there is no compelling evidence for parity violation in BOSS. Our new statistics can be used to search for parity violation in future surveys, such as DESI, without 8PCF biases.

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.