chen - simons重力中交叉双谱的新形状

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

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-01-09 DOI:10.1088/1475-7516/2025/01/037

Perseas Christodoulidis, Jinn-Ouk Gong, Wei-Chen Lin, Maria Mylova and Misao Sasaki

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引用次数: 0

摘要

已知陈-西蒙斯引力在暴胀期间受到引力子幽灵的影响，这抑制了与宇宙微波背景观测相关的尺度上违反宇称的功率谱。在这项工作中，我们证明了允许暴胀的初始条件偏离标准的Bunch-Davies状态可以增强标量张量交叉双谱中的违反奇偶性的非高斯性。我们的结果揭示了在扁平结构中对交叉双谱的重要额外贡献，为约束违反宇称的引力提供了新的途径。

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New shape for cross-bispectra in Chern-Simons gravity

Chern-Simons gravity is known to suffer from graviton ghost production during inflation, which suppresses the parity-violating power spectrum at scales relevant to cosmic microwave background observations. In this work, we show that allowing the initial conditions of inflation to deviate from the standard Bunch-Davies state can enhance parity-violating non-Gaussianity in the scalar-tensor cross-bispectra. Our results reveal a significant additional contribution to the cross-bispectra in the flattened configuration, offering a new avenue to constrain parity-violating gravity.

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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.