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P. D. Meerburg et al
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Similar

Y. Wang, Z. Wang, and Y. Zhu, “Non-standard primordial clocks from induced mass in alternative to inflation scenarios,” JCAP
Original
2007
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K. Kogai, K. Akitsu, F. Schmidt, and Y. Urakawa, “Galaxy imaging surveys as spin-sensitive detector for cosmological colliders,” JCAP
Original
2009
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2010
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2010
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Then

X. Chen, M. H. Namjoo, and Y. Wang, “Models of the Primordial Standard Clock,” JCAP
Original
2015
Later among the works it cites.
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.
X. Chen, M. H. Namjoo, and Y. Wang, “Quantum Primordial Standard Clocks,” JCAP
Original
2016
Later among the works it cites.
X. Chen, P. D. Meerburg, and M. Münchmeyer, “The Future of Primordial Features with 21 cm Tomography,” JCAP
Original

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2021

Missing Scalars at the Cosmological Collider

Lu, Qianshu, Reece, Matthew, Xianyu, Zhong-Zhi

Understand

Light scalar fields typically develop spatially varying backgrounds during inflation.

Very often they do not directly affect the density perturbations, but interact with other fields that do leave nontrivial signals in primordial perturbations.
In this sense they become "missing scalars" at the cosmological collider.
We study potentially observable signals of these missing scalars, focusing on a special example where a missing scalar distorts the usual oscillatory features in the squeezed bispectrum.