NUK - logo
E-viri
Celotno besedilo
Recenzirano Odprti dostop
  • The NA48/2 collaboration; J. R. Batley; G. Kalmus; C. Lazzeroni; D. J. Munday; M. W. Slater; R. Arcidiacono; N. Cabibbo; A. Ceccucci; D. Cundy; V. Falaleev; A. Gonidec; W. Kubischta; A. Maier; A. Norton; M. Patel; A. Peters; E. Swallow; R. Winston; P. Rubin; A. Walker; P. Dalpiaz; C. Damiani; M. Martini; F. Petrucci; M. Savrié; M. Scarpa; H. Wahl; W. Baldini; A. Cotta Ramusino; A. Gianoli; E. Celeghini; E. Iacopini; M. Lenti; M. Veltri; K. Eppard; M. Hita-Hochgesand; P. Marouelli; L. Masetti; U. Moosbrugger; C. Morales Morales; B. Renk; R. Wanke; A. Winhart; A. Dabrowski; T. Fonseca Martin; M. Shieh; M. Velasco; M. D. Wood; G. Anzivino; E. Imbergamo; A. Nappi; M. Piccini; M. Raggi; M. Valdata-Nappi; P. Cenci; M. Pepe; M. C. Petrucci; F. Costantini; N. Doble; L. Fiorini; S. Giudici; G. Pierazzini; M. Sozzi; S. Venditti; G. Collazuol; L. Di Lella; I. Mannelli; A. Michetti; C. Cerri; B. Bloch-Devaux; J. B. Chèze; M. De Beer; J. Derré; E. Mazzucato; B. Peyaud; B. Vallage; M. Holder; M. Ziolkowski; S. Bifani; M. Clemencic; N. Cartiglia; F. Marchetto; H. Dibon; M. Jeitler; M. Markytan; I. Mikulec; G. Neuhofer; L. Widhalm; S. Balev; E. Goudzovski; P. Hristov; V. Kekelidze; V. Kozhuharov; L. Litov; D. Madigozhin; N. Molokanova; I. Polenkevich; S. Stoynev; A. Zinchenko

    The journal of high energy physics, 03/2024, Letnik: 2024, Številka: 3
    Journal Article

    Abstract The NA48/2 experiment at CERN reports the first observation of the K ± → π 0 π 0 μ ± ν decay based on a sample of 2437 candidates with 15% background contamination collected in 2003–2004. The decay branching ratio in the kinematic region of the squared dilepton mass above 0.03 GeV2/c 4 is measured to be (0.65 ± 0.03) × 10 −6. The extrapolation to the full kinematic space, using a specific model, is found to be (3.45 ± 0.16) × 10 −6, in agreement with chiral perturbation theory predictions.