Journal
PHYSICA SCRIPTA
Volume T121, Issue -, Pages 153-155Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0031-8949/2005/T121/023
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I briefly review cosmological bounds on neutrino masses and the underlying gravitational physics at a level appropriate for readers outside the field of cosmology. For the case of three massive neutrinos with standard model freezeout, the current 95% upper limit on the sum of their masses is 0.42eV. I summarize the basic physical mechanism making matter clustering such a sensitive probe of massive neutrinos. I discuss the prospects of doing still better in coming years using tools such as lensing tomography, approaching a sensitivity around 0.03eV. Since the lower bound from atmospheric neutrino oscillations is around 0.05eV, upcoming cosmological measurements should detect neutrino mass if the technical and fiscal challenges can be met.
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