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.

Observation of the rare decay K-S -> pi(0)e(+)e(-)

LAMANNA, GIANLUCA;COSTANTINI, FLAVIO;GIUDICI, SERGIO;SOZZI, MARCO STANISLAO;
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.
Batley, Jr; Kalmus, Ge; Lazzeroni, C; Munday, Dj; Patel, M; Slater, Mw; Wotton, Sa; Arcidiacono, R; Bocquet, G; Ceccucci, A; Cundy, D; Doble, N; Falaleev, V; Gatignon, L; Gonidec, A; Grafstrom, P; Kubischta, W; Marchetto, F; Mikulec, I; Norton, A; Panzer Steindel, B; Rubin, P; Wahl, H; Goudzovski, E; Gurev, D; Hristov, P; Kekelidze, V; Litov, L; Madigozhin, D; Molokanova, N; Potrebenikov, Y; Stoynev, S; Zinchenko, A; Monnier, E; Swallow, E; Winston, R; Sacco, R; Walker, A; Baldini, W; Dalpiaz, P; Frabetti, Pl; Gianoli, A; Martini, M; Petrucci, F; Scarpa, M; Savrie, M; Bizzeti, A; Calvetti, M; Collazuol, G; Graziani, G; Iacopini, E; Lenti, M; Martelli, F; Ruggiero, G; Veltri, M; Behler, M; Eppard, K; Eppard, M; Hirstius, A; Kleinknecht, K; Koch, U; Masetti, L; Marouelli, P; Moosbrugger, U; Morales, Cm; Peters, A; Wanke, R; Winhart, A; Dabrowski, A; Martin, Tf; Lopez, Sg; Velasco, M; Anzivino, G; Cenci, P; Imbergamo, E; Lamanna, Gianluca; Lubrano, P; Michetti, A; Nappi, A; Pepe, M; Petrucci, Mc; Piccini, M; Valdata, M; Cerri, C; Costantini, Flavio; Fantechi, R; Fiorini, L; Giudici, Sergio; Mannelli, I; Pierazzini, G; Sozzi, MARCO STANISLAO; Cheshkov, C; Cheze, Jb; De Beer, M; Debu, P; Gouge, G; Marel, G; Mazzucato, E; Peyaud, B; Vallage, B; Holder, M; Maier, A; Ziolkowski, M; Biino, C; Cartiglia, N; Clemencic, M; Menichetti, E; Pastrone, N; Wislicki, W; Dibon, H; Jeitler, M; Markytan, M; Neuhofer, G; Widhalm, L.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/185831
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