Search for CP violation in $K^{0} \to 3 \pi^{0}$ decays

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Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K_S -> 3 pi0 has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K0/K0bar -> 3 pi0 decays, the CP violating amplitude eta_000 = A(K_S -&g...

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Detalles Bibliográficos
Autores principales: Lai, A., Marras, D., Batley, J.R., Dosanjh, R.S., Gershon, T.J., Kalmus, G.E., Lazzeroni, C., Munday, D.J., Olaiya, E., Parker, Michael Andrew, White, T.O., Wotton, S.A., Arcidiacono, R., Barr, G., Bocquet, G., Ceccucci, A., Cuhadar-Donszelmann, T., Cundy, D., Doble, N., Falaleev, V., Gatignon, L., Gonidec, A., Gorini, B., Grafstrom, P., Kubischta, W., Lacourt, A., Mikulec, I., Norton, A., Panzer-Steindel, B., Tatishvili, G., Wahl, Heinrich, Cheshkov, C., Hristov, P., Kekelidze, V., Madigojine, D., Molokanova, N., Potrebenikov, Yu., Zinchenko, A., Martin, V., Rubin, P., Sacco, R., Walker, A., Contalbrigo, M., Dalpiaz, P., Duclos, J., Fiorini, M., Frabetti, P.L., Gianoli, A., Martini, M., Petrucci, F., Savrie, M., Bizzeti, A., Calvetti, M., Collazuol, G., Graziani, G., Iacopini, E., Lenti, M., Martelli, F., Veltri, M., Eppard, K., Eppard, M., Hirstius, A., Kleinknecht, K., Koch, U., Kopke, L., Lopes da Silva, P., Marouelli, P., Mestvirishvili, I., Pellmann, I., Peters, A., Schmidt, S.A., Schonharting, V., Schue, Y., Wanke, R., Winhart, A., Wittgen, M., Chollet, J.C., Fayard, L., Iconomidou-Fayard, L., Unal, G., Wingerter-Seez, I., Anzivino, G., Cenci, P., Imbergamo, E., Lubrano, P., Mestvirishvili, A., Nappi, A., Pepe, M., Piccini, M., Casali, R., Cerri, C., Cirilli, M., Costantini, F., Fantechi, R., Fiorini, L., Giudici, S., Mannelli, I., Pierazzini, G., Sozzi, M., Cheze, J.B., De Beer, M., Debu, P., Derue, F., Formica, A., Granier de Cassagnac, R., Gouge, G., Marel, G., Mazzucato, E., Peyaud, B., Turlay, R., Vallage, B., Holder, M., Maier, A., Ziolkowski, M., Biino, C., Cartiglia, N., Marchetto, F., Menichetti, Ezio A., Pastrone, N., Nassalski, J., Rondio, E., Szleper, M., Wislicki, W., Wronka, S., Dibon, H., Jeitler, M., Markytan, M., Neuhofer, G., Pernicka, M., Taurok, A., Widhalm, L.
Lenguaje:eng
Publicado: 2004
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2005.01.065
http://cds.cern.ch/record/788599
Descripción
Sumario:Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K_S -> 3 pi0 has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K0/K0bar -> 3 pi0 decays, the CP violating amplitude eta_000 = A(K_S -> 3 pi0)/A(K_L -> 3 pi0) has been found to be Re(eta_000) = -0.002 +- 0.011 +- 0.015 and Im(eta_000) = -0.003 +- 0.013 +- 0.017. This corresponds to an upper limit on the branching fraction of Br(K_S -> 3 pi0) < 7.4 x 10^-7 at 90% confidence level. The result is used to improve knowledge of Re(epsilon) and the CPT violating quantity Im(delta) via the Bell-Steinberger relation.

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