/ Experiment-HEP hep-ex/0408053


Search for CP violation in K0 ---> 3 pi0 decays


Lai, A. (INFN, Cagliari) ; Marras, D. (INFN, Cagliari) ; Batley, J.R. (Cambridge U.) ; Dosanjh, R.S. (Cambridge U.) ; Gershon, T.J. (Cambridge U.) ; Kalmus, G.E. (Cambridge U.) ; Lazzeroni, C. (Cambridge U.) ; Munday, D.J. (Cambridge U.) ; Olaiya, E. (Cambridge U.) ; Parker, Michael Andrew (Cambridge U.) ; White, T.O. (Cambridge U.) ; Wotton, S.A. (Cambridge U.) ; Arcidiacono, R. (CERN) ; Barr, G. (CERN) ; Bocquet, G. (CERN) ; Ceccucci, A. (CERN) ; Cuhadar-Donszelmann, T. (CERN) ; Cundy, D. (CERN) ; Doble, N. (CERN) ; Falaleev, V. (CERN) ; Gatignon, L. (CERN) ; Gonidec, A. (CERN) ; Gorini, B. (CERN) ; Grafstrom, P. (CERN) ; Kubischta, W. (CERN) ; Lacourt, A. (CERN) ; Mikulec, I. (CERN) ; Norton, A. (CERN) ; Panzer-Steindel, B. (CERN) ; Tatishvili, G. (CERN) ; Wahl, Heinrich (CERN) ; Cheshkov, C. (Dubna, JINR) ; Hristov, P. (Dubna, JINR) ; Kekelidze, V. (Dubna, JINR) ; Madigojine, D. (Dubna, JINR) ; Molokanova, N. (Dubna, JINR) ; Potrebenikov, Yu. (Dubna, JINR) ; Zinchenko, A. (Dubna, JINR) ; Martin, V. (Edinburgh U.) ; Rubin, P. (Edinburgh U.) ; Sacco, R. (Edinburgh U.) ; Walker, A. (Edinburgh U.) ; Contalbrigo, M. (INFN, Ferrara) ; Dalpiaz, P. (INFN, Ferrara) ; Duclos, J. (INFN, Ferrara) ; Fiorini, M. (INFN, Ferrara) ; Frabetti, P.L. (INFN, Ferrara) ; Gianoli, A. (INFN, Ferrara) ; Martini, M. (INFN, Ferrara) ; Petrucci, F. (INFN, Ferrara) ; Savrie, M. (INFN, Ferrara) ; Bizzeti, A. (INFN, Florence) ; Calvetti, M. (INFN, Florence) ; Collazuol, G. (INFN, Florence) ; Graziani, G. (INFN, Florence) ; Iacopini, E. (INFN, Florence) ; Lenti, M. (INFN, Florence) ; Martelli, F. (INFN, Florence) ; Veltri, M. (INFN, Florence) ; Eppard, K. (Mainz U., Inst. Phys.) ; Eppard, M. (Mainz U., Inst. Phys.) ; Hirstius, A. (Mainz U., Inst. Phys.) ; Kleinknecht, K. (Mainz U., Inst. Phys.) ; Koch, U. (Mainz U., Inst. Phys.) ; Kopke, L. (Mainz U., Inst. Phys.) ; Lopes da Silva, P. (Mainz U., Inst. Phys.) ; Marouelli, P. (Mainz U., Inst. Phys.) ; Mestvirishvili, I. (Mainz U., Inst. Phys.) ; Pellmann, I. (Mainz U., Inst. Phys.) ; Peters, A. (Mainz U., Inst. Phys.) ; Schmidt, S.A. (Mainz U., Inst. Phys.) ; Schonharting, V. (Mainz U., Inst. Phys.) ; Schue, Y. (Mainz U., Inst. Phys.) ; Wanke, R. (Mainz U., Inst. Phys.) ; Winhart, A. (Mainz U., Inst. Phys.) ; Wittgen, M. (Mainz U., Inst. Phys.) ; Chollet, J.C. (Orsay, LAL) ; Fayard, L. (Orsay, LAL) ; Iconomidou-Fayard, L. (Orsay, LAL) ; Unal, G. (Orsay, LAL) ; Wingerter-Seez, I. (Orsay, LAL) ; Anzivino, G. (INFN, Perugia) ; Cenci, P. (INFN, Perugia) ; Imbergamo, E. (INFN, Perugia) ; Lubrano, P. (INFN, Perugia) ; Mestvirishvili, A. (INFN, Perugia) ; Nappi, A. (INFN, Perugia) ; Pepe, M. (INFN, Perugia) ; Piccini, M. (INFN, Perugia) ; Casali, R. (INFN, Pisa) ; Cerri, C. (INFN, Pisa) ; Cirilli, M. (INFN, Pisa) ; Costantini, F. (INFN, Pisa) ; Fantechi, R. (INFN, Pisa) ; Fiorini, L. (INFN, Pisa) ; Giudici, S. (INFN, Pisa) ; Mannelli, I. (INFN, Pisa) ; Pierazzini, G. (INFN, Pisa) ; Sozzi, M. (INFN, Pisa) ; Cheze, J.B. (DAPNIA, Saclay) ; De Beer, M. (DAPNIA, Saclay) ; Debu, P. (DAPNIA, Saclay) ; Derue, F. (DAPNIA, Saclay) ; Formica, A. (DAPNIA, Saclay) ; Granier de Cassagnac, R. (DAPNIA, Saclay) ; Gouge, G. (DAPNIA, Saclay) ; Marel, G. (DAPNIA, Saclay) ; Mazzucato, E. (DAPNIA, Saclay) ; Peyaud, B. (DAPNIA, Saclay) ; Turlay, R. (DAPNIA, Saclay) ; Vallage, B. (DAPNIA, Saclay) ; Holder, M. (Siegen U.) ; Maier, A. (Siegen U.) ; Ziolkowski, M. (Siegen U.) ; Biino, C. (INFN, Turin) ; Cartiglia, N. (INFN, Turin) ; Marchetto, F. (INFN, Turin) ; Menichetti, Ezio A. (INFN, Turin) ; Pastrone, N. (INFN, Turin) ; Nassalski, J. (Warsaw, Inst. Nucl. Studies) ; Rondio, E. (Warsaw, Inst. Nucl. Studies) ; Szleper, M. (Warsaw, Inst. Nucl. Studies) ; Wislicki, W. (Warsaw, Inst. Nucl. Studies) ; Wronka, S. (Warsaw, Inst. Nucl. Studies) ; Dibon, H. (Vienna, OAW) ; Jeitler, M. (Vienna, OAW) ; Markytan, M. (Vienna, OAW) ; Neuhofer, G. (Vienna, OAW) ; Pernicka, M. (Vienna, OAW) ; Taurok, A. (Vienna, OAW) ; Widhalm, L. (Vienna, OAW)

Published in: Phys.Lett.
Year: 2005
Vol.: B610
Page No: 165-176
Pages: 18

Abstract: Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K_S -> 3 pi0 has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K0/K0bar -> 3 pi0 decays, the CP violating amplitude eta_000 = A(K_S -> 3 pi0)/A(K_L -> 3 pi0) has been found to be Re(eta_000) = -0.002 +- 0.011 +- 0.015 and Im(eta_000) = -0.003 +- 0.013 +- 0.017. This corresponds to an upper limit on the branching fraction of Br(K_S -> 3 pi0) < 7.4 x 10^-7 at 90% confidence level. The result is used to improve knowledge of Re(epsilon) and the CPT violating quantity Im(delta) via the Bell-Steinberger relation.

Web-Page: http://pdglive.lbl.gov/REFERENCE_info1.brl?slacrpp=PHLTA,B610,165

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