Measurement of the branching ratio of the deca $K_{L} \to \pi^{\pm}e^{\mp}\nu$ and extraction of the CKM parameter $|V_{us}|$
- Lai, A.
- Marras, D.
- Bevan, A.
- Dosanjh, R.S.
- Gershon, T.J.
- Hay, B.
- Kalmus, G.E.
- Lazzeroni, C.
- Munday, D.J.
- Olaiya, E.
- Parker, Michael Andrew
- White, T.O.
- Wotton, S.A.
- 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, Heinrich
- Cheshkov, C.
- Gaponenko, A.
- Hristov, P.
- Kekelidze, V.
- Litov, L.
- Madigojine, D.
- Molokanova, N.
- Potrebenikov, Yu.
- Stoynev, S.
- Tatishvili, G.
- Tkatchev, A.
- Zinchenko, A.
- Knowles, I.
- Martin, V.
- Sacco, R.
- Walker, A.
- Contalbrigo, M.
- Dalpiaz, P.
- Duclos, J.
- Frabetti, P.L.
- 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, H.G.
- Eppard, K.
- Eppard, M.
- Fox, H.
- Kalter, A.
- Kleinknecht, K.
- Koch, U.
- Kopke, L.
- Lopes da Silva, P.
- Marouelli, P.
- Pellmann, I.
- Peters, A.
- Renk, B.
- Schmidt, S.A.
- Schonharting, V.
- Schue, Y.
- Wanke, R.
- Winhart, A.
- Wittgen, M.
- Chollet, J.C.
- 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, F.
- Fantechi, R.
- Fiorini, L.
- Giudici, S.
- Lamanna, G.
- Mannelli, I.
- Pierazzini, G.
- Sozzi, M.
- Cheze, J.B.
- Cogan, J.
- De Beer, M.
- Debu, P.
- Formica, A.
- Granier de Cassagnac, R.
- 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, Ezio A.
- 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.
DOIAbstract
We present a new measurement of the branching ratio $R$ of the decay $K_{L} \to \pi^{\pm}e^{\mp}\nu$, denoted as $K_{e3}$, relative to all charged $K_{L}$ decays with two tracks, based on data taken with the NA48 detector at the CERN SPS. We measure $R=0.4978 \pm 0.0035$. From this we derive the $K_{e3}$ branching fraction and the weak coupling parameter $|V_{us}|$ in the CKM matrix. We obtain $|V_{us}| f_{+}(0) = 0.2146 \pm 0.0016$, where $f_{+}(0)$ is the vector form factor in the $K_{e3}$ decay.We present a new measurement of the branching ratio R of the decay KL -> pi e nu (Ke3), relative to all charged KL 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 d...
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