Data di Pubblicazione:
2003
Abstract:
The K-S --> gammagamma decay rate has been measured with the NA48 detector using a high intensity short neutral beam from the CERN SPS. The measured branching ratio BR(K-S gammagamma) = (2.78 +/- 0.06(stat) +/- 0.04(syst)) x 10(-6), obtained from 7461 +/- 172 K-S --> gammagamma events, is significantly higher than the O(p(4)) prediction of chiral perturbation theory. Using a K-L beam the ratio Gamma(K-L-->gammagamma)/Gamma(K-L-->pi(0)pi(0)pi(0)) = (2.81 +/- 0.01(stat) +/- 0.02(syst)) x 10(-3) has been measured. (C) 2002 Elsevier Science B.V All rights reserved.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
CHIRAL PERTURBATION-THEORY
Elenco autori:
A. Lai;D. Marras;J. R. Batley;R. S. Dosanjh;T. J. Gershon;G. E. Kalmus;C. Lazzeroni;D. J. Munday;E. Olaiya;M. A. Parker;T. O. White;S. A. Wotton;R. Arcidiacono;G. Barr;G. Bocquet;A. Ceccucci;T. Cuhadar-Doszelmann;D. Cundy;N. Doble;V. Falaleev;L. Gatignon;A. Gonidec;B. Gorini;P. Grafstrom;W. Kubischta;A. Lacourt;I. Mikulec;A. Norton;B. Panzer-Steindel;G. Tatishvili;H. Wahl;C. Cheshkov;P. Hristov;V. Kekelidze;D. Madigojine;N. Molokanova;Y. Potrebenikov;A. Zinchenko;V. Martin;P. Rubin;R. Sacco;A. Walker;M. Contalbrigo;P. Dalpiaz;J. Duclos;P. L. Frabetti;A. Gianoli;M. Martini;E. Petrucci;M. Savrie;A. Bizzeti;M. Calvetti;G. Collazuol;G. Graziani;E. Iacopini;M. Lenti;F. Martelli;M. Veltri;M. Eppard;A. Hirstius;K. Holtz;K. Kleinknecht;U. Koch;L. Kopke;P. L. da;P. Marouelli;I. Mestvirishvili;I. Pellmann;A. Peters;S. A. Schmidt;V. Schoharting;Y. Schue;R. Wanke;A. Winhart;M. Wittgen;J. C. Chollet;L. Fayard;L. Iconomidou-Fayard;G. Unal;I. Wingerter-Seez;G. Anzivino;P. Cenci;E. Imbergamo;P. Lubrano;A. Mestvirishvili;A. Nappi;M. Pepe;M. Piccini;R. Casali;C. Cerri;M. Cirilli;F. Costantini;R. Fantechi;L. Fiorini;S. Giudici;I. Mannelli;G. Pierazzini;M. Sozzi;J. B. Cheze;M. D. Beer;P. Debu;F. Derue;A. Formica;R. G. de;G. Gouge;G. Marel;E. Mazzucato;B. Peyaud;R. Turlay;B. Vallage;M. Holder;A. Maier;M. Ziolkowski;C. Biino;N. Cartiglia;F. Marchetto;E. Menichetti;N. Pastrone;J. Nassalski;E. Rondio;M. Szleper;W. Wislicki;S. Wronka;H. Dibon;M. Jeitler;M. Markytan;G. Neuhofer;M. Pernicka;A. Taurok;L. Widhalm
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