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astro-ph.CO2026
First Search for Kaluza-Klein Gravitons and Radion Using Planck Data
Alexander P. Cassem, Soubhik Kumar
Heavy moduli and Kaluza-Klein (KK) gravitons from extra dimensions may evade terrestrial probes but can be produced during inflation, generating primordial non-Gaussianity (NG) thr…
astro-ph.CO2025
Cosmological Constraints on Secluded Dark Radiation
Jae Hyeok Chang, Peizhi Du, Subhajit Ghosh +1
Dark radiation (DR) is ubiquitous in physics beyond the Standard Model (SM), and its interactions with the SM and dark matter (DM) lead to a variety of interesting effects on cosmo…