Limits on Neutrino Mass from Cosmic Structure Formation

Details Limits on Neutrino Mass from Cosmic Structure Formation Limits on Neutrino Mass from Cosmic Structure Formation

1999-08-24

arxiv.org/abs/hep-ph/9908450v1

Phys.Rev.Lett.84:1082-1085,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages with 2 figures

Scientific paper

10.1103/PhysRevLett.84.1082

We consider the effect of three species of neutrinos with nearly degenerate mass on the cosmic structure formation in a low matter-density universe within a hierarchical clustering scenario with a flat initial perturbation spectrum. The matching condition for fluctuation powers at the COBE scale and at the cluster scale leads to a strong upper limit on neutrino mass. For a flat universe with matter density parameter Omega=0.3, we obtain m_nu<0.6eV for the Hubble constant H_0<80km/s/Mpc. Allowing for the more generous parameter space limited by Omega<0.4, H_0<80km/s/Mpc and age t_0>11.5Gyr, the limit is 0.9eV.

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