Measurement of the decay rate and form factor parameter alpha(K*) in the decay K-L -> e(+)e(-)gamma
Articolo
Data di Pubblicazione:
1999
Abstract:
The decay rate of the neutral K meson K-L --> e(+)e(-)gamma has been measured with the NA48 detector at the CERN SPS. A total of 6864 events has been observed with an estimated background of 10 events. The branching ratio is Gamma(K-L --> e(+)e(-)gamma)/Gamma(K-L --> all) = (1.06 +/- 0.02(stat) +/- 0.02(sys) +/- 0.04(calc)) X 10(-5). The parameter alpha(K*) describing the relative strength of the two contributing amplitudes to this decay through intermediate pseudoscalar or vector mesons was measured to be alpha(K*) = -0.36 +/- 0.06(stat) +/- 0.02(sys). (C) 1999 Published by Elsevier Science B.V. All rights reserved.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
RADIATIVE-CORRECTIONS; BRANCHING RATIO; KL->E+E-GAMMA
Elenco autori:
V. Fanti;A. Lai;L. Musa;D. Marras;A. Nappi;B. Hay;R. W. Moore;K. N. Moore;D. J. Munday;M. D. Needham;M. A. Parker;T. O. White;S. A. Wotton;G. Barr;G. Bocquet;J. Bremer;A. Ceccucci;D. Cundy;N. Doble;W. Funk;L. Gatignon;A. Gianoli;A. Gonidec;G. Govi;P. Grafstrom;W. Kubischta;A. Lacourt;S. Luitz;G. Kesseler;J. P. Matheys;A. Norton;S. Palestini;B. Panzer-Steindel;D. Schinzel;H. Taureg;M. Velasco;O. Vossnack;H. Wahl;G. Wirrer;V. Kekelidze;A. Mestvirishvili;G. Tatishvili;I. Potrebenikov;A. Tkatchev;A. Zinchenko;O. Boyle;V. J. Martin;I. G. Knowles;H. L. C.;P. Dalpaiz;J. Duclos;P. L. Frabetti;M. Martini;F. Petrucci;M. Porcu;M. Savrie;A. Bizzeti;M. Calvetti;G. Collazuol;G. Graziani;E. Iacopini;M. Lenti;A. Michetti;H. G. Becker;H. Blumer;P. Buchholz;D. Coward;C. Ebersberger;H. Fox;A. Kalter;K. Kleinknecht;U. Koch;L. Kopke;B. Renk;J. Scheidt;J. Schmidt;V. Schonharting;Y. Schue;R. Wilhelm;A. Winhart;M. Wittgen;J. C. Chollet;S. Crepe;L. Iconomidou-Fayard;L. Fayard;J. Ocariz;G. Unal;D. Vattolo;I. Wingerter;G. Anzivino;P. Cenci;P. Lubrano;M. Pepe;B. Gorini;P. Calafiura;R. Carosi;C. Cerri;M. Cirilli;F. Costantini;R. Fantechi;S. Giudici;I. Mannelli;G. Pierazzini;M. Sozzi;J. B. Cheze;J. Cogan;M. D. Beer;P. Debu;A. Formica;R. G. de;P. Hristov;E. Mazzucato;B. Peyaud;S. Schanne;R. Turlay;B. Vallage;I. Augustin;M. Bender;M. Holder;M. Ziolkowski;R. Arcidiacono;C. Biino;F. Marchetto;E. Menichetti;J. Nassalski;E. Rondio;M. Szleper;W. Wislicki;S. Wronka;H. Dibon;G. Fischer;M. Jeitler;M. Markytan;I. Mikulec;G. Neuhofer;M. Pernicka;A. Taurok
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