Data di Pubblicazione:
2003
Abstract:
A search for the decay K-S --> pi(0)e(+)e(-) has been made by the NA48/1 experiment at the CERN SPS accelerator. Using data collected during 89 days in 2002 with a high-intensity KS beam, 7 events were found with a background of 0.15 events.. The branching fraction BR(K-S --> pi(0)e(+)e(-), m(ee) > 0.165 GeV/c(2)) = (3.0(-1.2)(+1.5) (stat)+/-0.2(syst)) x 10(-9) has been measured. Using a vector matrix element and a form factor equal to one, the measurement gives BR(K-S --> pi(0)e(+)e(-)) = (5.8(-2.4)(+2.9)) x 10(-9). (C) 2003 Elsevier B.V. All rights reserved.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
CP VIOLATION; KAON DECAYS; K-L; SEARCH
Elenco autori:
J. R. Batley;G. E. Kalmus;C. Lazzeroni;D. J. Munday;M. Patel;M. W. Slater;S. A. Wotton;R. Arcidiacono;G. Bocquet;A. Ceccucci;D. Cundy;N. Doble;V. Falaleev;L. Gatignon;A. Gonidec;P. Grafstrom;W. Kubischta;F. Marchetto;I. Mikulec;A. Norton;B. Panzer-Steindel;P. Rubin;H. Wahl;E. Goudzovski;D. Gurev;P. Hristov;V. Kekelidze;L. Litov;D. Madigozhin;N. Molokanova;Y. Potrebenikov;S. Stoynev;A. Zinchenko;E. Monnier;E. Swallow;R. Winston;R. Sacco;A. Walker;W. Baldini;P. Dalpiaz;P. L. Frabetti;A. Gianoli;M. Martini;F. Petrucci;M. Scarpa;M. Savrie;A. Bizzeti;M. Calvetti;G. Collazuol;G. Graziani;E. Iacopini;M. Lenti;F. Martelli;G. Ruggiero;M. Veltri;M. Behler;K. Eppard;M. Eppard;A. Hirstius;K. Kleinknecht;U. Koch;L. Masetti;P. Marouelli;U. Moosbrugger;C. M. Morales;A. Peters;R. Wanke;A. Winhart;A. Dabrowski;T. F. Martin;S. G. Lopez;M. Velasco;G. Anzivino;P. Cenci;E. Imbergamo;G. Lamanna;P. Lubrano;A. Michetti;A. Nappi;M. Pepe;M. C. Petrucci;M. Piccini;M. Valdata;C. Cerri;F. Costantini;R. Fantechi;L. Fiorini;S. Giudici;I. Mannelli;G. Pierazzini;M. Sozzi;C. Cheshkov;J. B. Cheze;M. D. Beer;P. Debu;G. Gouge;G. Marel;E. Mazzucato;B. Peyaud;B. Vallage;M. Holder;A. Maier;M. Ziolkowski;C. Biino;N. Cartiglia;M. Clemencic;E. Menichetti;N. Pastrone;W. Wislicki;H. Dibon;M. Jeitler;M. Markytan;G. Neuhofer;L. Widhalm
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