1. Search for direct CP violating charge asymmetries in $K^\pm\to\pi^\pm\pi^+\pi^-$ and $K^\pm\to\pi^\pm\pi^0\pi^0$ decays
- Author
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Batley, J Richard, Culling, A J, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Slater, M W, Wotton, S A, Arcidiacono, R, Bocquet, G, Cabibbo, Nicola, Ceccucci, A, Cundy, Donald C, Falaleev, V, Fidecaro, Maria, Gatignon, L, Gonidec, A, Kubischta, Werner, Norton, A, Maier, A, Patel, M, Peters, A, Balev, S, Frabetti, P L, Goudzovski, E, Khristov, P Z, Kekelidze, V D, Kozhuharov, V, Litov, L, Madigozhin, D T, Marinova, E, Molokanova, N A, Polenkevich, I, Potrebenikov, Yu K, Stoynev, S, Zinchenko, A I, Monnier, E, Swallow, E, Winston, R, Rubin, P, Walker, A, Baldini, W, Cotta-Ramusino, A, Dalpiaz, P, Damiani, C, Fiorini, M, Gianoli, A, Martini, M, Petrucci, F, Savrié, M, Scarpa, M, Wahle, H, Bizzeti, A, Calvetti, M, Celeghini, E, Iacopini, E, Lenti, M, Martelli, F, Ruggiero, G, Veltri, M, Behler, M, Eppard, K, Kleinknecht, K, Marouelli, P, Masetti, L, Moosbrugger, U, Morales-Morales, C, Renk, B, Wache, M, Wanke, R, Winhart, A, Coward, D, Dabrowski, A, Fonseca-Martin, T, Shieh, M, Szleper, M, Velasco, M, Wood, M D, Anzivino, Giuseppina, Cenci, P, Imbergamo, E, Nappi, A, Pepé, M, Petrucci, M C, Piccini, M, Raggi, M, Valdata-Nappi, M, Cerri, C, Collazuol, G, Costantini, F, Di Lella, L, Doble, N, Fantechi, R, Fiorini, L, Giudici, S, Lamanna, G, Mannelli, I, Michetti, A, Pierazzini, G M, Sozzi, M, Bloch-Devaux, B, Cheshkov, C, Chèze, J B, De Beer, M, Derré, J, Marel, Gérard, Mazzucato, E, Peyaud, B, Vallage, B, Holder, M, Ziolkowski, M, Bifani, S, Biino, C, Cartiglia, N, Clemencic, M, Goy-Lopez, S, Marchetto, F, Dibon, Heinz, Jeitler, Manfred, Markytan, Manfred, Mikulec, I, Neuhofer, G, and Widhalm, L
- Subjects
Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes $A_g=(g^+-g^-)/(g^++g^-)$ in $K^\pm\to\pi^\pm\pi^+\pi^-$ and $K^\pm\to\pi^\pm\pi^0\pi^0$ decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous $K^+$ and $K^-$ beams and a large data sample collected allowed a result of an unprecedented precision. The charge asymmetries were measured to be $A^c_g=(-1.5\pm2.2)\times10^{-4}$ with $3.11\times 10^9$ $K^{\pm}\to\pi^\pm\pi^+\pi^-$ decays, and $A^n_g=(1.8\pm1.8)\times10^{-4}$ with $9.13\times 10^7$ $K^{\pm}\to\pi^\pm\pi^0\pi^0$ decays. The precision of the results is limited mainly by the size of the data sample., Comment: 29 pages, 9 figures. An updated version accepted by the EPJC
- Published
- 2007