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Neutrino masses from CMB B-mode polarization and cosmic growth rate

Constraints on neutrino masses are estimated based on future observations of the cosmic microwave background (CMB), which includes the B-mode polarization produced by CMB lensing from the Planck satellite, and the growth rate of cosmic structure from the Euclid redshift survey by using the Markov-Chain Monte-Carlo (MCMC) method. The error in the bound on the total neutrino mass is estimated to be $Δ\sum m_ν = 0.075$ eV with a 68\% confidence level. By using the growth rate rather than the galaxy power spectrum, accurate constraints are obtained, since the growth rate is less influenced by the uncertainty regarding galaxy bias than by the galaxy power spectrum.

preprint2015arXivOpen access
Koichi Hirano
astro-ph.COhep-phgr-qchep-th
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Koichi Hirano

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