Measurement of the K L → e +e -e +e - decay rate

A. Lai*, D. Marras, A. Bevan, R. S. Dosanjh, T. J. Gershon, B. Hay, G. E. Kalmus, C. Lazzeroni, D. J. Munday, M. D. Needham, E. Olaiya, M. A. Parker, T. O. White, S. A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar, D. Cundy, G. D'AgostiniN. Doble, V. Falaleev, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, A. Norton, S. Palestini, B. Panzer-Steindel, G. Tatishvili, H. Taureg, M. Velasco, H. Wahl, C. Cheshkov, P. Hristov, V. Kekelidze, D. Madigojine, N. Molokanova, Yu Potrebenikov, A. Zinchenko, I. Knowles, V. Martin, R. Sacco, A. Walker, M. Contalbrigo, P. Dalpiaz, J. Duclos, P. L. Frabetti, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, M. Lenti, G. Ruggiero, H. G. Becker, M. Eppard, H. Fox, K. Eppard, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes Da Silva, P. Marouelli, I. Melzer-Pellmann, A. Peters, B. Renk, S. A. Schmidt, V. Schönharting, Y. Schué, R. Wanke, A. Winhart, M. Wittgen, J. C. Chollet, L. Fayard, L. Iconomidou-Fayard, J. Ocariz, G. Unal, I. Wingerter-Seez, G. Anzivino, P. Cenci, E. Imbergamo, G. Lamanna, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, R. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, L. Fiorini, S. Giudici, I. Mannelli, G. Pierazzini, M. Sozzi, J. B. Cheze, J. Cogan, M. De Beer, P. Debu, A. Formica, R. Granier De Cassagnac, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, G. Fischer, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, M. Pernicka, A. Taurok, L. Widhalm

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The decay rate of the long-lived neutral K meson into the e +e -e +e - final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br(K L→ e +e -e +e -)=(3.30±0.24 stat±0.23 syst±0.10 norm) ×10 -8.

Original languageEnglish (US)
Pages (from-to)31-38
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume615
Issue number1-2
DOIs
StatePublished - May 26 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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