$New measurements of the $\eta$ and $K^0$ masses$

New measurements of the $\eta$ and $K^0$ masses

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.

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Veröffentlicht in:	Physics letters. B 2002, Vol.533, p.196-206
Hauptverfasser:	Lai, A., Marras, D., Batley, J R., Bevan, A., Dosanjh, R S., Gershon, T J., Hay, B., Kalmus, G E., Lazzeroni, C., Munday, D J., Needham, M D., Olaiya, E., Parker, M A., White, T O., Wotton, S A., Barr, G., Bocquet, G., Ceccucci, A., Cuhadar-Donszelmann, T., Cundy, D., d'Agostini, G., Doble, N., Falaleev, V P., Funk, W., Gatignon, L., Gonidec, A., Gorini, B., Govi, G., Grafstrom, P., Kubischta, W., Lacourt, A., Lenti, M., Luitz, S., Matheys, J P., Mikulec, I., Norton, A., Palestini, S., Panzer-Steindel, B., Schinzel, D., Tatishvili, G., Taureg, H., Velasco, M., Vossnack, O., Wahl, H., Cheshkov, C., Gaponenko, A., Khristov, P Z., Kekelidze, V., Madigojine, D., Molokanova, N., Potrebenikov, Yu, Tkachev, A., Zinchenko, A., Knowles, I., Martin, V., Parsons, H., Sacco, R., Walker, A., Contalbrigo, M., Dalpiaz, P., Duclos, J., Frabetti, P L., Gianoli, A., Martini, M., Petrucci, F., Savrie, M., Scarpa, M., Bizzeti, A., Calvetti, M., Collazuol, G., Graziani, G., Iacopini, E., Martelli, F., Veltri, M., Becker, H G., Bluemer, H., Coward, D., Eppard, M., Fox, H., Hirstius, A., Holtz, K., Kalter, A., Kleinknecht, K., Koch, U., Kopke, L., Lopes da Silva, P., Marouelli, P., Pellmann, I., Peters, A., Schmidt, S A., Schonharting, V., Schue, Y., Wanke, R., Winhart, A., Wittgen, M., Chollet, J C., Crepe, S., Fayard, L., Iconomidou-Fayard, L., Ocariz, J.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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.
ISSN:	0370-2693