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New measurements of the $\eta$ and $K^0$ masses / NA48 Collaboration
New measurements of the $\eta$ and $K^0$ masses have been performed using decays to 3$\pi^0$ with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects, the results $M(\eta) = 547.843\pm0.051$~MeV/c$^2$ and $M(K^0) = 497.625\pm0.031$~MeV/c$^2$ were obtained..
hep-ex/0204008; CERN-EP-2002-025; CERN-EP-2002-025.- Geneva : CERN, 2002 - 17 p. - Published in : Phys. Lett. B 533 (2002) 196-206 Fulltext: arXiv:hep-ex_0204008 - PDF; ep-2002-025 - PDF; External link: Preprint - Please contact the library if you need to access this document.

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