Charged loops at the cosmological collider with chemical potential
Abstract
A bstract 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 dependencies for both the signal and the background. We show that a signal strength $${f}_{\text{NL}}\sim \mathcal{O}(0.01)$$ can be obtained within theoretical control, potentially reachable by 21 cm tomography. As an application we consider the colored Higgs bosons in SU(5) supersymmetric orbifold grand unification with masses M ≲ 10 15 GeV.
Fields of Study & Subjects
Particle Detector Development and Performance
Particle Accelerators and Free-Electron Lasers
Electrical and Electromagnetic Research
Publication details
- Journal / source
- Journal of High Energy Physics
- Publisher
- Springer Science and Business Media LLC
- Volume
- 2026
- Issue
- 1
- Publication date
- 13 January 2026
- Language
- EN