Light Relics of the Early Universe (Final Technical Report)
- Univ. of California, San Diego, CA (United States); The Regents of the University of California; University of California San Diego
The research supported by this award invested two types of signals left over of the early universe that might be observed in maps of the universe: (i) particles produced (thermal relics) during the hot big bang and (ii) signals left in the seeds of structure left from from an inflationary epoch prior to the hot big bang (inflationary relics). The research into thermal relics exposed new signatures of the cosmic neutrino background in the distribution of galaxies, culminating in the first measurement of the neutrino induced phase shift of the baryon acoustic oscillations. Subsequent research explored implications of constraints on hot light particles from the cosmic microwave background and the large scale structure for the physics of dark matter. Green and collaborations also investigated cosmological signatures from the inflationary epoch, including the best constraint to date on oscillatory features in seeds of structure and the first viable proposal to test the quantum origin of structure in the universe.
- Research Organization:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science and Technology (ST); USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- SC0019035
- OSTI ID:
- 1840603
- Report Number(s):
- DOE-UCSD-0019035
- Country of Publication:
- United States
- Language:
- English
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