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- Title
Displaced new physics at colliders and the early universe before its first second.
- Authors
Calibbi, Lorenzo; D'Eramo, Francesco; Junius, Sam; Lopez-Honorez, Laura; Mariotti, Alberto
- Abstract
Displaced vertices at colliders, arising from the production and decay of long-lived particles, probe dark matter candidates produced via freeze-in. If one assumes a standard cosmological history, these decays happen inside the detector only if the dark matter is very light because of the relic density constraint. Here, we argue how displaced events could very well point to freeze-in within a non-standard early universe history. Focusing on the cosmology of inflationary reheating, we explore the interplay between the reheating temperature and collider signatures for minimal freeze-in scenarios. Observing displaced events at the LHC would allow to set an upper bound on the reheating temperature and, in general, to gather indirect information on the early history of the universe.
- Subjects
PHYSICAL cosmology; PHYSICS; DARK matter; UNIVERSE; PARTICLE decays; HADRON colliders; INFLATIONARY universe
- Publication
Journal of High Energy Physics, 2021, Vol 2021, Issue 5, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP05(2021)234