Measurement of the branching ratio and form factors for the decay $K_{L} \to \pi^{\pm}\pi^{0} e^{\mp}\nu_{e}(\bar{\nu}_{e})$

The $K_{L} \to \pi^{\pm}\pi^{0}e^{\mp}\nu_{e}(\bar{\nu_{e}})$ decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio $Br(K_{L} \to \pi^{\pm}\pi^{0}e^{\mp}\nu_{e}(\bar{\nu_{e}})) = 5.21 \pm 0.07_{stat} \pm 0.09_{syst}) \times 10^{-5}$ w...

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Detalles Bibliográficos
Autores principales: Batley, J.R., Dosanjh, R.S., Gershon, T.J., Kalmus, G.E., Lazzeroni, C., Munday, D.J., Olaiya, E., Patel, M., Parker, Michael Andrew, White, T.O., Wotton, S.A., Arcidiacono, R., Bocquet, G., Ceccucci, A., Cuhadar-Donszelmann, T., Cundy, D., Doble, N., Falaleev, V., Gatignon, L., Gonidec, A., Gorini, B., Grafstrom, P., Kubischta, W., Mikulec, I., Norton, A., Palestini, S., Wahl, Heinrich, Cheshkov, C., Hristov, P., Kekelidze, V., Litov, L., Madigozhin, D., Molokanova, N., Potrebenikov, Yu., Zinchenko, A., Rubin, P., Sacco, R., Walker, A., Bettoni, D., Calabrese, R., Dalpiaz, P., Duclos, J., Frabetti, P.L., Gianoli, A., Martini, M., Masetti, L., Petrucci, F., Savrie, M., Scarpa, M., Bizzeti, A., Calvetti, M., Collazuol, G., Iacopini, E., Lenti, M., Martelli, F., Ruggiero, G., Veltri, M., Eppard, K., Eppard, M., Hirstius, A., Kleinknecht, K., Koch, U., Kopke, L., Lopes da Silva, P., Marouelli, P., Mestvirishvili, I., Morales Morales, C., Pellmann, I., Peters, A., Renk, B., Schmidt, S.A., Schonharting, V., Wanke, R., Winhart, A., Chollet, J.C., Fayard, L., Graziani, G., Iconomidou-Fayard, L., Unal, G., Wingerter-Seez, I., Anzivino, G., Cenci, P., Imbergamo, E., Lamanna, G., Lubrano, P., Mestvirishvili, A., Michetti, A., Nappi, A., Pepe, M., Piccini, M., Valdata-Nappi, 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., Gouge, G., Marel, G., Mazzucato, E., Peyaud, B., Turlay, R., Vallage, B., Holder, M., Maier, A., Ziolkowski, M., Biino, C., Cartiglia, N., Clemencic, M., Marchetto, F., Menichetti, Ezio A., Pastrone, N., Nassalski, J., Rondio, E., 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.2004.05.026
http://cds.cern.ch/record/734151
Descripción
Sumario:The $K_{L} \to \pi^{\pm}\pi^{0}e^{\mp}\nu_{e}(\bar{\nu_{e}})$ decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio $Br(K_{L} \to \pi^{\pm}\pi^{0}e^{\mp}\nu_{e}(\bar{\nu_{e}})) = 5.21 \pm 0.07_{stat} \pm 0.09_{syst}) \times 10^{-5}$ was fixed from a sample of 5464 events with 62 background events. The form factors $\bar{f_{s}}, \bar{f_{p}}, \lambda_{g}$ and $\bar{h}$ were found to be in agreement with previous measurements but with higher accuracy. The coupling parameter of the chiral Lagrangian $L3=(−4.1\pm 0.2) \times 10^{−3}$ was evaluated from the data.

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