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Similar

X. Chen and Y. Wang, “Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation,” Phys. Rev. D
Original
2010
Cited alongside, same era.
A. Bodas, S. Kumar, and R. Sundrum, “The Scalar Chemical Potential in Cosmological Collider Physics,” JHEP
Original
2010
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R. Flauger, L. McAllister, E. Pajer, A. Westphal, and G. Xu, “Oscillations in the CMB from Axion Monodromy Inflation,” JCAP
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2010
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X. Chen, “Folded Resonant Non-Gaussianity in General Single Field Inflation,” JCAP
Original
2010
Cited alongside, same era.
X. Chen, “Fingerprints of Primordial Universe Paradigms as Features in Density Perturbations,” Phys. Lett. B

Then

X. Chen, Y. Wang, and Z.-Z. Xianyu, “Loop Corrections to Standard Model Fields in Inflation,” JHEP
Original
2016
Later among the works it cites.
H. Lee, D. Baumann, and G. L. Pimentel, “Non-Gaussianity as a Particle Detector,” JHEP
Original
2016
Later among the works it cites.
P. D. Meerburg, M. Münchmeyer, J. B. Muñoz, and X. Chen, “Prospects for Cosmological Collider Physics,” JCAP
Original
2017
Later among the works it cites.
X. Chen, Y. Wang, and Z.-Z. Xianyu, “Standard Model Background of the Cosmological Collider,” Phys. Rev. Lett
Original
2017
Later among the works it cites.
X. Chen, Y. Wang, and Z.-Z. Xianyu, “Standard Model Mass Spectrum in Inflationary Universe,” JHEP

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2022

Classical Cosmological Collider Physics and Primordial Features

Chen, Xingang, Ebadi, Reza, Kumar, Soubhik

Understand

Features in the inflationary landscape can inject extra energies to inflation models and produce on-shell particles with masses much larger than the Hubble scale of inflation.

This possibility extends the energy reach of the program of cosmological collider physics, in which signals associated with these particles are generically Boltzmann-suppressed.
We study the mechanisms of this classical cosmological collider in two categories of primordial features.
In the first category, the primordial feature is classical oscillation, which includes the case of coherent oscillation of a massive field and the case of oscillatory features in the inflationary potential.