UMICH-2015: Neutrino and Light Relativisic Species break-out session 3

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Neutrino Masses

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?