A new measurement of direct CP violation in two pion decays of the neutral kaon RID C-6551-2009 RID A-4071-2012

FANTI, VIVIANA;Lai A;Marras D;Musa L;Bevan AJ;Gershon TJ;Hay B;Moore RW;Moore KN;Munday DJ;Needham MD;Parker MA;Takach SF;White TO;Wotton SA;Barr G;Blumer H;Bocquet G;Bremer J;Ceccucci A;Cogan J;Cundy D;Doble N;Funk W;Gatignon L;Gianoli A;Gonidec A;Govi G;Grafstrom P;Kesseler G;Kubischta W;Lacourt A;Luitz S;Matheys JP;Norton A;Palestini S;Panzer Steindel B;Peyaud B;Schinzel D;Taureg H;Velasco M;Vossnack O;Wahl H;Wirrer G;Gaponenko A;Kekelidze V;Madigojine D;Mestvirishvili A;Potrebenikov Y;Tatishvili G;Tkatchev A;Zinchenko A;Bertolotto L;Boyle O;Knowles IG;Martin VJ;Parsons HLC;Peach KJ;Talamonti C;Contalbrigo M;Dalpiaz P;Duclos J;Formica A;Frabetti PL;Martini M;Petrucci F;Savrie M;Bizzeti A;Calvetti M;Collazuol G;Graziani G;Iacopini E;Lenti M;Michetti A;Becker HG;Buchholz P;Coward D;Ebersberger C;Fox H;Kalter A;Kleinknecht K;Koch U;Kopke L;Renk B;Scheidt J;Schmidt J;Schonharting V;Schue Y;Wilhelm R;Wittgen M;Chollet JC;Crepe S;Fayard L;Iconomidou Fayard L;Ocariz J;Unal G;Vattolo D;Wingerter Seez I;Anzivino G;Bordacchini F;Cenci P;Lubrano P;Nappi A;Pepe M;Punturo M;Bertanza L;Bigi A;Calafiura P;Carosi R;Casali R;Cerri C;Cirilli M;Costantini F;Fantechi R;Giudici S;Gorini B;Manelli I;Marzulli V;Pierazzini G;Raffaelli F;Sozzi M;Cheze JB;De Beer M;Debu P;de Cassagnac RG;Hristov P;Mazzucato E;Schanne S;Turlay R;Vallage B;Augustin I;Bender M;Holder M;Ziolkowski M;Arcidiacono R;Biino C;Cester R;Marchetto F;Menichetti E;Pastrone N;Nassalski J;Rondio E;Szleper M;Wislicki W;Wronka S;Dibon H;Fischer G;Jeitler M;Markytan M;Mikulec I;Neuhofer G;Pernicka M;Taurok A.

1999-01-01

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Abstract

The NA48 experiment at CERN has performed a new measurement of direct CP violation, based on data taken in 1997 by simultaneously collecting K-L and K-S decays into pi(0)pi(0) and pi(+)pi(-). The result for the CP violating parameter Re(epsilon'/epsilon) is (18.5 +/- 4.5(stat) +/- 5.8(syst)) X 10(-4). (C) 1999 Elsevier Science B.V. All rights reserved.