Physics Letters B (Nov 2014)

Measurement of the absolute branching ratio of the K+→π+π−π+(γ) decay with the KLOE detector

  • D. Babusci,
  • I. Balwierz-Pytko,
  • G. Bencivenni,
  • C. Bloise,
  • F. Bossi,
  • P. Branchini,
  • A. Budano,
  • L. Caldeira Balkeståhl,
  • F. Ceradini,
  • P. Ciambrone,
  • F. Curciarello,
  • E. Czerwiński,
  • E. Danè,
  • V. De Leo,
  • E. De Lucia,
  • G. De Robertis,
  • A. De Santis,
  • P. De Simone,
  • A. Di Cicco,
  • A. Di Domenico,
  • R. Di Salvo,
  • D. Domenici,
  • O. Erriquez,
  • G. Fanizzi,
  • A. Fantini,
  • G. Felici,
  • S. Fiore,
  • P. Franzini,
  • A. Gajos,
  • P. Gauzzi,
  • G. Giardina,
  • S. Giovannella,
  • E. Graziani,
  • F. Happacher,
  • L. Heijkenskjöld,
  • B. Höistad,
  • T. Johansson,
  • D. Kamińska,
  • W. Krzemien,
  • A. Kupsc,
  • J. Lee-Franzini,
  • F. Loddo,
  • S. Loffredo,
  • G. Mandaglio,
  • M. Martemianov,
  • M. Martini,
  • M. Mascolo,
  • R. Messi,
  • S. Miscetti,
  • G. Morello,
  • D. Moricciani,
  • P. Moskal,
  • A. Palladino,
  • A. Passeri,
  • V. Patera,
  • I. Prado Longhi,
  • A. Ranieri,
  • P. Santangelo,
  • I. Sarra,
  • M. Schioppa,
  • B. Sciascia,
  • M. Silarski,
  • L. Tortora,
  • G. Venanzoni,
  • W. Wiślicki,
  • M. Wolke

Journal volume & issue
Vol. 738
pp. 128 – 133

Abstract

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The absolute branching ratio of the K+→π+π−π+(γ) decay, inclusive of final-state radiation, has been measured using ∼17 million tagged K+ mesons collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory. The result is:BR(K+→π+π−π+(γ))=0.05565±0.00031stat±0.00025syst a factor ≃ 5 more precise with respect to the previous result. This work completes the program of precision measurements of the dominant kaon branching ratios at KLOE. Keywords: e+e− experiments, Kaon decays