UMICH-2015: Neutrino and Light Relativisic Species break-out session 3
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- How will lab constraints compare to CMB/cosmological constraints?
- What experiments are competitive?
- What measurements are complimentary?
- What can we learn from long/short baseline experiments?
- What is the role of neutrinoless double beta decay experiments?
- What is the interplay with cosmology?
- How do CMB constraints compare to constraints from BBN?
- Current constraints on axion-like particles are dominated by D/H measurements
- Will this improve with CMB S4?
- Additional massless fields are constrained by stellar cooling
- Currently stronger than CMB constraints on Neff (for some cases)
- CMB S4 should be much stronger(?)
- How do these compare to lab / other constraints
- E.g. for axion-like particles (from arXiv:1501.04097)
Laboratory Input for Cosmology
- What improvements from lab experiments would benefit cosmology?
- Primordial deuterium abundance measurements are measured with precision better than theory uncertainty.
- How would better primordial abundance measurements complement CMB measurements of neutrino properties and related science?
Direct Cosmic Neutrino Detection
- PTOLEMY seeks to measure cosmic neutrinos through capture on beta decaying nuclei
- How can CMB measurements influence experimental design?
- What would we learn about cosmology from such an experiment?