We present a new measurement of the branching ratio R of the decay K-L --> pi(+/-) e(-/+)v, denoted as K(e)3, relative to all charged K-L decays with two tracks, based on data taken with the NA48 detector at the CERN SPS. We measure R = 0.4978 +/- 0.0035. From this we derive the K(e)3 branching fraction and the weak coupling parameter \V-us\ in the CKM matrix. We obtain \V-us\ f(+) (0) = 0.2146 +/- 0.0016, where f(+) (0) is the vector form factor in the K(e)3 decay. (C) 2004 Published by Elsevier B.V.

Measurement of the branching ratio of the decay K-L ->pi(+/-)e(-/+) neutrino and extraction of the CKM parameter vertical bar V-us vertical bar RID A-4071-2012

COSTANTINI, FLAVIO;GIUDICI, SERGIO;LAMANNA, GIANLUCA;SOZZI, MARCO STANISLAO;
2004

Abstract

We present a new measurement of the branching ratio R of the decay K-L --> pi(+/-) e(-/+)v, denoted as K(e)3, relative to all charged K-L decays with two tracks, based on data taken with the NA48 detector at the CERN SPS. We measure R = 0.4978 +/- 0.0035. From this we derive the K(e)3 branching fraction and the weak coupling parameter \V-us\ in the CKM matrix. We obtain \V-us\ f(+) (0) = 0.2146 +/- 0.0016, where f(+) (0) is the vector form factor in the K(e)3 decay. (C) 2004 Published by Elsevier B.V.
Lai, A; Marras, D; Bevan, A; Dosanjh, Rs; Gershon, Tj; Hay, B; Kalmus, Ge; Lazzeroni, C; Munday, Dj; Olaiya, E; Parker, Ma; White, To; Wotton, Sa; Barr, G; Bocquet, G; Ceccucci, A; Cuhadar Donszelmann, T; Cundy, D; D'Agostini, G; Doble, N; Falaleev, V; Gatignon, L; Gonidec, A; Gorini, B; Govi, G; Grafstrom, P; Kubischta, W; Lacourt, A; Norton, A; Palestini, S; Panzer Steindel, B; Taureg, H; Velasco, M; Wahl, H; Cheshkov, C; Gaponenko, A; Hristov, P; Kekelidze, V; Litov, L; Madigojine, D; Molokanova, N; Potrebenikov, Y; Stoynev, S; Tatishvili, G; Tkatchev, A; Zinchenko, A; Knowles, I; Martin, V; Sacco, R; Walker, A; Contalbrigo, M; Dalpiaz, P; Duclos, J; Frabetti, Pl; Gianoli, A; Martini, M; Petrucci, F; Savrie, M; Bizzeti, A; Calvetti, M; Collazuol, G; Graziani, G; Iacopini, E; Lenti, M; Martelli, F; Veltri, M; Becker, Hg; Eppard, K; Eppard, M; Fox, H; Kalter, A; Kleinknecht, K; Koch, U; Kopke, L; da Silva, Pl; Marouelli, P; Pellmann, I; Peters, A; Renk, B; Schmidt, Sa; Schonharting, V; Schue, Y; Wanke, R; Winhart, A; Wittgen, M; Chollet, Jc; Fayard, L; Iconomidou Fayard, L; Ocariz, J; Unal, G; Wingerter Seez, I; Anzivino, G; Cenci, P; Imbergamo, E; Lubrano, P; Mestvirishvili, A; Nappi, A; Pepe, M; Piccini, M; Casali, R; Cerri, C; Cirilli, M; Costantini, Flavio; Fantechi, R; Fiorini, L; Giudici, Sergio; Lamanna, Gianluca; Mannelli, I; Pierazzini, G; Sozzi, MARCO STANISLAO; Cheze, Jb; Cogan, J; De Beer, M; Debu, P; Formica, A; de Cassagnac, Rg; Mazzucato, E; Peyaud, B; Turlay, R; Vallage, B; Holder, M; Maier, A; Ziolkowski, M; Arcidiacono, R; Biino, C; Cartiglia, N; Guida, R; Marchetto, F; Menichetti, E; Pastrone, N; 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; Widhalm, L.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/91550
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