Determining Neutrino Mass from the CMB Alone

Details Determining Neutrino Mass from the CMB Alone Determining Neutrino Mass from the CMB Alone

2003-03-17

arxiv.org/abs/astro-ph/0303344v3

Phys.Rev.Lett.91:241301,2003

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure; Version accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.91.241301

Distortions of Cosmic Microwave Background (CMB) temperature and polarization maps caused by gravitational lensing, observable with high angular resolution and high sensitivity, can be used to measure the neutrino mass. Assuming two massless species and one with mass m_nu we forecast sigma(m_nu) = 0.15 eV from the Planck satellite and sigma(m_nu)=0.04 eV from observations with twice the angular resolution and about 20 times the sensitivity. A detection is likely at this higher sensitivity since the observation of atmospheric neutrino oscillations require mass-squared differences greater than about (0.04 eV)^2.

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