New measurements of the η and K0 masses
A. Lai, NA48 collaboration
Abstract
New measurements of the η and K0 masses have been performed using decays to 3π0 with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects, the results M(η) = 547.8430.051 MeV/c2 and M(K0) = 497.6250.031 MeV/c2 were obtained.
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