Cosmological measurement of the neutrino mass sum to 0.015 eV
In plain words
Cosmology can weigh neutrinos because heavier neutrinos smooth out the clumping of matter. The task is to measure the total mass with cosmological data, not just bound it.
Precise statement
Measure sum $m_\nu$ with uncertainty $\sigma \le 0.015\,\mathrm{eV}$ from CMB lensing, galaxy clustering and BAO, with the reionization optical depth $\tau$ measured independently to $\sigma(\tau) \sim 0.002$. An answer is a value that also discriminates normal from inverted ordering.
What would settle it
Simons Observatory and LiteBIRD-era CMB lensing and large-scale polarization combined with final DESI and Euclid.
Problems built on this one
Special cases
Results
No results have been posted on this problem yet.
Post a result · how results are checked
Sign in to follow or save this problem
Comments (0)
Comments are not records: they are not signed, stamped or logged. How comments work
No comments yet.
Sign in to comment.