2013/05/01 by Luis A. Anchordoqui, Anchordoqui, Luis A., Haim Goldberg +3
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1305.0146
openalex publication_date 2013/05/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Llight-element abundances probing big bang nucleosynthesis and precision data from cosmology probing the cosmic microwave background decoupling epoch have hinted at the presence of extra relativistic degrees of freedom. This is widely referred to as "dark radiation", suggesting the need for new light states in the UV completion of the standard model. We provide a brief and concise overview of the current observational status of such dark radiation and investigate the interplay between two possible interpretations of the extra light states: the right-handed partners of three Dirac neutrinos (which interact with all fermions through the exchange of a new heavy vector meson) and dark matter particles that were produced through a non-thermal mechanism, such us late time decays of massive relics. This model ties together cosmological indications of extra light states and the production of the heavy vector particle at the LHC.