Charged Loops at the Cosmological Collider with Chemical Potential
Abstract
Cosmological collider physics allows the detection of heavy particles at inflationary scales through their imprints on primordial non-Gaussianities. We study the chemical potential mechanism applied to a pair of charged scalars. We analytically evaluate the resulting one-loop contribution to the bispectrum, using the spectral decomposition. In this way we are able to determine the parametric dependences for both the signal and the background. We show that a signal strength can be obtained within theoretical control, potentially reachable by 21cm tomography. As an application we consider the colored Higgs bosons in supersymmetric orbifold grand unification with masses .
Keywords
Cite
@article{arxiv.2507.22978,
title = {Charged Loops at the Cosmological Collider with Chemical Potential},
author = {Arushi Bodas and Edward Broadberry and Raman Sundrum and Zhaohui Xu},
journal= {arXiv preprint arXiv:2507.22978},
year = {2026}
}
Comments
71 pages, 25 figures; typos corrected, references added, revised argument in section 3.2, 6 and 7.2, results unchanged