A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag = (g(+) - g(-))/(g(+) + g(-)) in K-+/- -> pi(+/-) pi(+) pi(-) and K-+/- -> pi(+/-) 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(g)(c) = (-1.5 +/- 2.2) x 10(-4) with 3.11 x 10(9) K-+/- -> pi(+/-) pi(+) pi(-) decays, and A(g)(n) = (1.8 +/- 1.8) x 10(-4) with 9.13 x 10(7) K-+/- -> pi(+/-) pi(0) pi(0) decays. The precision of the results is limited mainly by the size of the data sample.

Search for direct CP violating charge asymmetries in K-+/- -> pi(+/-)pi(+)pi(-) and K-+/- -> pi(+/-)pi(0)pi(0) decays / J.R. Batley; A.J. Culling; G. Kalmus; C. Lazzeroni; D.J. Munday; M.W. Slater; S.A. Wotton; R. Arcidiacono; G. Bocquet; N. Cabibbo; A. Ceccucci; D. Cundy; 16; V. Falaleev; M. Fidecaro; L. Gatignon; A. Gonidec; W. Kubischta; A. Norton; A. Maier; M. Patel; A. Peters; S. Balev; P.L. Frabetti; E. Goudzovski; P. Hristov; V. Kekelidze; V. Kozhuharov; L. Litov; D. Madigozhin; E. Marinova; N. Molokanova; I. Polenkevich; Y. Potrebenikov; S. Stoynev; A. Zinchenko; E. Monnier; E. Swallow; R. Winston; P. Rubin; A. Walker; W. Baldini; A. CottaRamusino; P. Dalpiaz; C. Damiani; M. Fiorini; A. Gianoli; M. Martini; F. Petrucci; M. Savrié; M. Scarpa; H. Wahl; A. Bizzeti; M. Calvetti; E. Celeghini; E. Iacopini; M. Lenti; F. Martelli; G. Ruggiero; M. Veltri; M. Behler; K. Eppard; K. Kleinknecht; P. Marouelli; L. Masetti; U. Moosbrugger; C. Morales Morales; B. Renk; M. Wache; R. Wanke; A. Winhart; D. Coward; A. Dabrowski; T. Fonseca Martin; M. Shieh; M. Szleper; M. Velasco; M.D. Wood; G. Anzivino; P. Cenci; E. Imbergamo; A. Nappi; M. Pepe; M.C. Petrucci; M. Piccini; M. Raggi; M. Valdata-Nappi; C. Cerri; G. Collazuol; F. Costantini; L. DiLella; N. Doble; R. Fantechi; L. Fiorini; S. Giudici; G. Lamanna; I. Mannelli; A. Michetti; G. Pierazzini; M. Sozzi; B. Bloch-Devaux; C. Cheshkov; J.B. Chèze; M. De Beer; J. Derré; G. Marel; E. Mazzucato; B. Peyaud; B. Vallage; M. Holder; M. Ziolkowski; S. Bifani; C. Biino; N. Cartiglia; M. Clemencic; S. Goy Lopez; F. Marchetto; H. Dibon; M. Jeitler; M. Markytan; I. Mikulec; G. Neuhofer; L. Widhalm. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 52:(2007), pp. 875-891. [10.1140/epjc/s10052-007-0456-7]

Search for direct CP violating charge asymmetries in K-+/- -> pi(+/-)pi(+)pi(-) and K-+/- -> pi(+/-)pi(0)pi(0) decays

CALVETTI, MARIO;CELEGHINI, ENRICO;IACOPINI, ENRICO;M. Lenti;
2007

Abstract

A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag = (g(+) - g(-))/(g(+) + g(-)) in K-+/- -> pi(+/-) pi(+) pi(-) and K-+/- -> pi(+/-) 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(g)(c) = (-1.5 +/- 2.2) x 10(-4) with 3.11 x 10(9) K-+/- -> pi(+/-) pi(+) pi(-) decays, and A(g)(n) = (1.8 +/- 1.8) x 10(-4) with 9.13 x 10(7) K-+/- -> pi(+/-) pi(0) pi(0) decays. The precision of the results is limited mainly by the size of the data sample.
2007
52
875
891
J.R. Batley; A.J. Culling; G. Kalmus; C. Lazzeroni; D.J. Munday; M.W. Slater; S.A. Wotton; R. Arcidiacono; G. Bocquet; N. Cabibbo; A. Ceccucci; D. Cundy; 16; V. Falaleev; M. Fidecaro; L. Gatignon; A. Gonidec; W. Kubischta; A. Norton; A. Maier; M. Patel; A. Peters; S. Balev; P.L. Frabetti; E. Goudzovski; P. Hristov; V. Kekelidze; V. Kozhuharov; L. Litov; D. Madigozhin; E. Marinova; N. Molokanova; I. Polenkevich; Y. Potrebenikov; S. Stoynev; A. Zinchenko; E. Monnier; E. Swallow; R. Winston; P. Rubin; A. Walker; W. Baldini; A. CottaRamusino; P. Dalpiaz; C. Damiani; M. Fiorini; A. Gianoli; M. Martini; F. Petrucci; M. Savrié; M. Scarpa; H. Wahl; A. Bizzeti; M. Calvetti; E. Celeghini; E. Iacopini; M. Lenti; F. Martelli; G. Ruggiero; M. Veltri; M. Behler; K. Eppard; K. Kleinknecht; P. Marouelli; L. Masetti; U. Moosbrugger; C. Morales Morales; B. Renk; M. Wache; R. Wanke; A. Winhart; D. Coward; A. Dabrowski; T. Fonseca Martin; M. Shieh; M. Szleper; M. Velasco; M.D. Wood; G. Anzivino; P. Cenci; E. Imbergamo; A. Nappi; M. Pepe; M.C. Petrucci; M. Piccini; M. Raggi; M. Valdata-Nappi; C. Cerri; G. Collazuol; F. Costantini; L. DiLella; N. Doble; R. Fantechi; L. Fiorini; S. Giudici; G. Lamanna; I. Mannelli; A. Michetti; G. Pierazzini; M. Sozzi; B. Bloch-Devaux; C. Cheshkov; J.B. Chèze; M. De Beer; J. Derré; G. Marel; E. Mazzucato; B. Peyaud; B. Vallage; M. Holder; M. Ziolkowski; S. Bifani; C. Biino; N. Cartiglia; M. Clemencic; S. Goy Lopez; F. Marchetto; H. Dibon; M. Jeitler; M. Markytan; I. Mikulec; G. Neuhofer; L. Widhalm
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