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.

Measurement of the decay rate and form factor parameter alpha(K*) in the decay K-L -> e(+)e(-)gamma

COSTANTINI, FLAVIO;GIUDICI, SERGIO;SOZZI, MARCO STANISLAO;
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.
Fanti, V; Lai, A; Musa, L; Marras, D; Nappi, A; Hay, B; Moore, Rw; Moore, Kn; Munday, Dj; Needham, Md; Parker, Ma; White, To; Wotton, Sa; Barr, G; Bocquet, G; Bremer, J; Ceccucci, A; Cundy, D; Doble, N; Funk, W; Gatignon, L; Gianoli, A; Gonidec, A; Govi, G; Grafstrom, P; Kubischta, W; Lacourt, A; Luitz, S; Kesseler, G; Matheys, Jp; Norton, A; Palestini, S; Panzer Steindel, B; Schinzel, D; Taureg, H; Velasco, M; Vossnack, O; Wahl, H; Wirrer, G; Kekelidze, V; Mestvirishvili, A; Tatishvili, G; Potrebenikov, I; Tkatchev, A; Zinchenko, A; Boyle, O; Martin, Vj; Knowles, Ig; Parsons, Hlc; Dalpaiz, P; Duclos, J; Frabetti, Pl; Martini, M; Petrucci, F; Porcu, M; Savrie, M; Bizzeti, A; Calvetti, M; Collazuol, G; Graziani, G; Iacopini, E; Lenti, M; Michetti, A; Becker, Hg; Blumer, H; Buchholz, P; Coward, D; Ebersberger, C; Fox, H; Kalter, A; Kleinknecht, K; Koch, U; Kopke, L; Renk, B; Scheidt, J; Schmidt, J; Schonharting, V; Schue, Y; Wilhelm, R; Winhart, A; Wittgen, M; Chollet, Jc; Crepe, S; Iconomidou Fayard, L; Fayard, L; Ocariz, J; Unal, G; Vattolo, D; Wingerter, I; Anzivino, G; Cenci, P; Lubrano, P; Pepe, M; Gorini, B; Calafiura, P; Carosi, R; Cerri, C; Cirilli, M; Costantini, Flavio; Fantechi, R; Giudici, Sergio; Mannelli, I; Pierazzini, G; Sozzi, MARCO STANISLAO; Cheze, Jb; Cogan, J; De Beer, M; Debu, P; Formica, A; de Cassagnac, Rg; Hristov, P; Mazzucato, E; Peyaud, B; Schanne, S; Turlay, R; Vallage, B; Augustin, I; Bender, M; Holder, M; Ziolkowski, M; Arcidiacono, R; Biino, C; Marchetto, F; Menichetti, E; Nassalski, J; Rondio, E; Szleper, M; Wislicki, W; Wronka, S; Dibon, H; Fischer, G; Jeitler, M; Markytan, M; Mikulec, I; Neuhofer, G; Pernicka, M; Taurok, A.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/191344
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 24
social impact