Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$

A search for the decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$ 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 $K_{S}$ beam, 7 events were found with a background of 0.15 events. The branching fraction $BR(K_{S} \righ...

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Detalles Bibliográficos
Autores principales: Batley, J.R., Kalmus, G.E., Lazzeroni, C., Munday, D.J., Patel, M., Slater, M.W., Wotton, S.A., 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, Yu., Stoynev, S., Zinchenko, A., Monnier, E., Swallow, E., Winston, R., Sacco, R., Walker, A., Baldini, W., Dalpiaz, P., Frabetti, P.L., 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 Morales, C., Peters, A., Wanke, R., Winhart, A., Dabrowski, A., Fonseca Martin, T., Goy Lopez, S., Velasco, M., Anzivino, G., Cenci, P., Imbergamo, E., Lamanna, G., Lubrano, P., Michetti, A., Nappi, A., Pepe, M., Petrucci, M.C., Piccini, M., Valdata, M., Cerri, C., Costantini, F., Fantechi, R., Fiorini, L., Giudici, S., Mannelli, I., Pierazzini, G., Sozzi, M., Cheshkov, C., Cheze, J.B., 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, Ezio A., Pastrone, N., Wislicki, W., Dibon, H., Jeitler, M., Markytan, M., Neuhofer, G., Widhalm, L.
Lenguaje:eng
Publicado: 2003
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2003.10.001
http://cds.cern.ch/record/645655
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author Batley, J.R.
Kalmus, G.E.
Lazzeroni, C.
Munday, D.J.
Patel, M.
Slater, M.W.
Wotton, S.A.
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, Yu.
Stoynev, S.
Zinchenko, A.
Monnier, E.
Swallow, E.
Winston, R.
Sacco, R.
Walker, A.
Baldini, W.
Dalpiaz, P.
Frabetti, P.L.
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 Morales, C.
Peters, A.
Wanke, R.
Winhart, A.
Dabrowski, A.
Fonseca Martin, T.
Goy Lopez, S.
Velasco, M.
Anzivino, G.
Cenci, P.
Imbergamo, E.
Lamanna, G.
Lubrano, P.
Michetti, A.
Nappi, A.
Pepe, M.
Petrucci, M.C.
Piccini, M.
Valdata, M.
Cerri, C.
Costantini, F.
Fantechi, R.
Fiorini, L.
Giudici, S.
Mannelli, I.
Pierazzini, G.
Sozzi, M.
Cheshkov, C.
Cheze, J.B.
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, Ezio A.
Pastrone, N.
Wislicki, W.
Dibon, H.
Jeitler, M.
Markytan, M.
Neuhofer, G.
Widhalm, L.
author_facet Batley, J.R.
Kalmus, G.E.
Lazzeroni, C.
Munday, D.J.
Patel, M.
Slater, M.W.
Wotton, S.A.
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, Yu.
Stoynev, S.
Zinchenko, A.
Monnier, E.
Swallow, E.
Winston, R.
Sacco, R.
Walker, A.
Baldini, W.
Dalpiaz, P.
Frabetti, P.L.
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 Morales, C.
Peters, A.
Wanke, R.
Winhart, A.
Dabrowski, A.
Fonseca Martin, T.
Goy Lopez, S.
Velasco, M.
Anzivino, G.
Cenci, P.
Imbergamo, E.
Lamanna, G.
Lubrano, P.
Michetti, A.
Nappi, A.
Pepe, M.
Petrucci, M.C.
Piccini, M.
Valdata, M.
Cerri, C.
Costantini, F.
Fantechi, R.
Fiorini, L.
Giudici, S.
Mannelli, I.
Pierazzini, G.
Sozzi, M.
Cheshkov, C.
Cheze, J.B.
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, Ezio A.
Pastrone, N.
Wislicki, W.
Dibon, H.
Jeitler, M.
Markytan, M.
Neuhofer, G.
Widhalm, L.
author_sort Batley, J.R.
collection CERN
description A search for the decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$ 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 $K_{S}$ beam, 7 events were found with a background of 0.15 events. The branching fraction $BR(K_{S} \rightarrow \pi^0 e^{+}e^{-}, m_{ee} > 0.165$ GeV/c$^{2}) = (3.0^{+1.5}_{-1.2(stat)} \pm 0.2(syst)) \times 10^{-9}$ has been measured. Using a vector matrix element and a form factor equal to one, the measurement gives $BR(K_{S} \rightarrow \pi^0 e^{+}e^{-}) = (5.8^{+2.9}_{-2.4}) \times 10^{-9}$.
id cern-645655
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2003
record_format invenio
spelling cern-6456552023-08-03T04:09:41Zdoi:10.1016/j.physletb.2003.10.001http://cds.cern.ch/record/645655engBatley, J.R.Kalmus, G.E.Lazzeroni, C.Munday, D.J.Patel, M.Slater, M.W.Wotton, S.A.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, Yu.Stoynev, S.Zinchenko, A.Monnier, E.Swallow, E.Winston, R.Sacco, R.Walker, A.Baldini, W.Dalpiaz, P.Frabetti, P.L.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 Morales, C.Peters, A.Wanke, R.Winhart, A.Dabrowski, A.Fonseca Martin, T.Goy Lopez, S.Velasco, M.Anzivino, G.Cenci, P.Imbergamo, E.Lamanna, G.Lubrano, P.Michetti, A.Nappi, A.Pepe, M.Petrucci, M.C.Piccini, M.Valdata, M.Cerri, C.Costantini, F.Fantechi, R.Fiorini, L.Giudici, S.Mannelli, I.Pierazzini, G.Sozzi, M.Cheshkov, C.Cheze, J.B.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, Ezio A.Pastrone, N.Wislicki, W.Dibon, H.Jeitler, M.Markytan, M.Neuhofer, G.Widhalm, L.Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$Particle Physics - ExperimentA search for the decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$ 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 $K_{S}$ beam, 7 events were found with a background of 0.15 events. The branching fraction $BR(K_{S} \rightarrow \pi^0 e^{+}e^{-}, m_{ee} > 0.165$ GeV/c$^{2}) = (3.0^{+1.5}_{-1.2(stat)} \pm 0.2(syst)) \times 10^{-9}$ has been measured. Using a vector matrix element and a form factor equal to one, the measurement gives $BR(K_{S} \rightarrow \pi^0 e^{+}e^{-}) = (5.8^{+2.9}_{-2.4}) \times 10^{-9}$.A search for the decay K S → π 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 K S beam, 7 events were found with a background of 0.15 events. The branching fraction BR (K S →π 0 e + e − , m ee >0.165  GeV /c 2 )=(3.0 +1.5 −1.2 ( stat )±0.2( syst ))×10 −9 has been measured. Using a vector matrix element and a form factor equal to one, the measurement gives BR( K S → π 0 e + e − )=(5.8 +2.9 −2.4 )×10 −9 .A search for the decay Ks->pi0e+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(Ks->pi0e+e-, m(ee) > 0.165 GeV/c^2) = (3.0^{+1.5}_{-1.2}(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(Ks->pi0e+e-) = (5.8^{+2.9}_{-2.4}) x 10^{-9}.hep-ex/0309075CERN-EP-2003-062CERN-EP-2003-062oai:cds.cern.ch:6456552003-09-09
spellingShingle Particle Physics - Experiment
Batley, J.R.
Kalmus, G.E.
Lazzeroni, C.
Munday, D.J.
Patel, M.
Slater, M.W.
Wotton, S.A.
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, Yu.
Stoynev, S.
Zinchenko, A.
Monnier, E.
Swallow, E.
Winston, R.
Sacco, R.
Walker, A.
Baldini, W.
Dalpiaz, P.
Frabetti, P.L.
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 Morales, C.
Peters, A.
Wanke, R.
Winhart, A.
Dabrowski, A.
Fonseca Martin, T.
Goy Lopez, S.
Velasco, M.
Anzivino, G.
Cenci, P.
Imbergamo, E.
Lamanna, G.
Lubrano, P.
Michetti, A.
Nappi, A.
Pepe, M.
Petrucci, M.C.
Piccini, M.
Valdata, M.
Cerri, C.
Costantini, F.
Fantechi, R.
Fiorini, L.
Giudici, S.
Mannelli, I.
Pierazzini, G.
Sozzi, M.
Cheshkov, C.
Cheze, J.B.
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, Ezio A.
Pastrone, N.
Wislicki, W.
Dibon, H.
Jeitler, M.
Markytan, M.
Neuhofer, G.
Widhalm, L.
Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$
title Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$
title_full Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$
title_fullStr Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$
title_full_unstemmed Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$
title_short Observation of the rare decay $K_{S} \rightarrow \pi^0 e^{+}e^{-}$
title_sort observation of the rare decay $k_{s} \rightarrow \pi^0 e^{+}e^{-}$
topic Particle Physics - Experiment
url https://dx.doi.org/10.1016/j.physletb.2003.10.001
http://cds.cern.ch/record/645655
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