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Search for the decay $K_{s} \to \pi^{0}e^{+}e^{-}$

A. Lai D. Marras R. Batley A. Bevan R S. Dosanjh T J. Gershon B. Hay G E. Kalmus D J. Munday E. Olaiya M A. Parker T O. White S A. Wotton G. Barr G. Bocquet A. Ceccucci T. Cuhadar-Donszelmann D. Cundy N. Doble V. Falaleev L. Gatignon A. Gonidec B. Gorini G. Govi P. Grafstrom W. Kubischta A. Lacourt M. Lenti A. Norton S. Palestini B. Panzer-Steindel G. Tatishvili H. Taureg M. Velasco H. Wahl C. Cheshkov A. Gaponenko P Z. Khristov V. Kekelidze D. Madigojine N. Molokanova Yu. Potrebenikov A. Tkachev A. Zinchenko I. Knowles C. Lazzeroni V. Martin R. Sacco A. Walker M. Contalbrigo P. Dalpiaz J. Duclos P L. Frabetti A. Gianoli M. Martini F. Petrucci M. Savrie A. Bizzeti M. Calvetti G. Collazuol G. Graziani E. Iacopini H G. Becker M. Eppard H. Fox K. Holtz A. Kalter K. Kleinknecht U. Koch L. Kopke P. Lopes da Silva P. Marouelli I. Pellmann A. Peters B. Renk S A. Schmidt V. Schonharting Y. Schue R. Wanke A. Winhart M. Wittgen J C. Chollet 1 L. Fayard 1 L. Iconomidou-Fayard 1 J. Ocariz 1 G. Unal 1 I. Wingerter-Seez 1 G. Anzivino P. Cenci E. Imbergamo P. Lubrano A. Mestvirishvili A. Nappi M. Pepe M. Piccini R. Carosi R. Casali C. Cerri M. Cirilli F. Costantini R. Fantechi 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 R. Guida 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
Abstract : A search for the decay $\kspiee$ has been made using the NA48 detector at the CERN SPS. Using data collected in 1999 during a 40-hour run with a high-intensity $\ks$ beam, an upper limit for the branching fraction ${\rm B}(\kspiee) 1.4 \times 10^{-7}$ at 90\% confidence level has been obtained. %Extrapolating this limit to the full phase-space %assuming the matrix element %model described above~\cite{bib:ambrosio}, %we find an upper limit of %${\cal B}(\kspiee) 6.5 \times 10^{-8}$ %at 90\% confidence level has been obtained
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Submitted on : Tuesday, September 18, 2001 - 9:58:34 AM
Last modification on : Tuesday, December 22, 2020 - 12:26:05 PM

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A. Lai, D. Marras, R. Batley, A. Bevan, R S. Dosanjh, et al.. Search for the decay $K_{s} \to \pi^{0}e^{+}e^{-}$. Physics Letters B, Elsevier, 2001, 514, pp.253-262. ⟨in2p3-00012200⟩

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