Prospects for cosmological collider physics
By P. Meerburg, M. Münchmeyer, Julian B. Muñoz, Xingang Chen. 2016
132 citations recorded by the source corpus.
It is generally expected that heavy fields are present during inflation, which can leave their imprint in late-time cosmological observables. The main signature of these fields is a small amount of distinctly shaped non-Gaussianity, which if detected, would provide a wealth of information about the particle spectrum of the inflationary Universe. Here we investigate to what extent these signatures can be detected or constrained using futuristic 21-cm surveys. We construct model-independent templates that extract the squeezed-limit behavior of the bispectrum, and examine their overlap with standard inflationary shapes and secondary non-Gaussianities. We then use these templates to forecast detection thresholds for different masses and couplings using a 3D reconstruction of modes during the dark ages (z∼ 30–100). We consider interactions of several broad classes of models and quantify their detectability as a function of the baseline of a dark ages interferometer. Our analysis shows that there exists the tantalizing possibility of discovering new particles with different masses and interactions with future 21-cm surveys.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/157dec8ae48d3f8a6de6b0c50998dc30f75592e4
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In Astronomy and Astrophysics
Citations in the corpus
- The cosmological bootstrap: inflationary correlators from symmetries and singularities (2018, unknown): “This may be viewed as an ultimate target for future generations of cosmological observations [120–122].”
- Schwinger-Keldysh diagrammatics for primordial perturbations (2017, background): “Because P −1/2 ζ ∼ 105, the amplitude of the clock signal in this bispectrum can be observably large [39].”