New measurements of the η and K0 masses

• Published in: Physics letters. B 2002-05, Vol.533 (3-4), p.196-206
• Main Authors: Lai, A., Marras, D., Batley, J.R., Bevan, A.J., Gershon, T.J., Munday, D.J., Olaiya, E., Parker, M.A., White, T.O., Ceccucci, A., Cuhadar-Dönszelmann, T., Cundy, D., D'Agostini, G., Doble, N., Funk, W., Gatignon, L., Gonidec, A., Gorini, B., Govi, G., Grafström, P., Kubischta, W., Lenti, M., Mikulec, I., Norton, A., Palestini, S., Panzer-Steindel, B., Schinzel, D., Tatishvili, G., Taureg, H., Velasco, M., Cheskov, C., Hristov, P., Madigojine, D., Molokanova, N., Martin, V.J., Rubin, P., Walker, A., Calabrese, R., Contalbrigo, M., Dalpiaz, P., Duclos, J., Martini, M., Savrié, M., Bizzeti, A., Collazuol, G., Graziani, G., Iacopini, E., Martelli, F., Becker, H.G., Fox, H., Holtz, K., Kalter, A., Köpke, L., Lopes da Silva, P., Marouelli, P., Pellmann, I., Schmidt, S.A., Schönharting, V., Winhart, A., Wittgen, M., Chollet, J.C., Fayard, L., Ocariz, J., Unal, G., Wingerter-Seez, I., Anzivino, G., Imbergamo, E., Lamanna, G., Lubrano, P., Mestvirishvili, A., Pepe, M., Piccini, M., Casali, R., Cirilli, M., Costantini, F., Fantechi, R., Fiorini, L., Giudici, S., Cheze, J.B., Debu, P., Derue, F., Formica, A., Gouge, G., Granier de Cassagnac, R., Mazzucato, E., Turlay, R., Vallage, B., Maier, A., Guida, R., Marchetto, F., Menichetti, E., Pastrone, N., Nassalski, J., Rondio, E., Wislicki, W., Wronka, S., Dibon, H., Neuhofer, G., Taurok, A., Widhalm, L.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(02)01573-3

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)=547.843±0.051 MeV/c2 and M(K0)=497.625±0.031 MeV/c2 were obtained.