title: Weighing neutrinos with galaxy cluster surveys.
abstract: Large future galaxy cluster surveys, combined with cosmic microwave background observations, can achieve a high sensitivity to the masses of cosmologically important neutrinos. We show that a weak lensing selected sample of > or approximately 100,000 clusters could tighten the current upper bound on the sum of masses of neutrino species by an order of magnitude, to a level of 0.03 eV. Since this statistical sensitivity is below the best existing lower limit on the mass of at least one neutrino species, a future detection is likely, provided that systematic errors can be controlled to a similar level.
authors.affiliation: Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
authors.forename: Sheng
authors.initials: S
authors.lastname: Wang
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Haiman
authors.forename: Wayne
authors.initials: W
authors.lastname: Hu
authors.forename: Justin
authors.initials: J
authors.lastname: Khoury
authors.forename: Morgan
authors.initials: M
authors.lastname: May