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Measurement of $K^{0}_{\mu3}$ form factors (2007) |
- Bevan, A,
- Anzivino, G,
- Arcidiacono, R,
- Barr, G,
- Becker, H G,
- Bernhard, R,
- Bertanza, L,
- Biino, C,
- Bizzeti, A,
- Bocquet, G,
- Calvetti, M,
- Carosi, R,
- Cartiglia, N,
- Casali, R,
- Ceccucci, A,
- Cenci, P,
- Cerri, C,
- Cheshkov, C,
- Chollet, J C,
- Chèze, J B,
- Cirilli, M,
- Cogan, J,
- Collazuol, G,
- Contalbrigo, M,
- Costantini, F,
- Çuhadar-Dönszelmann, T,
- Cundy, D,
- D'Agostini, G,
- Dalpiaz, P,
- De Beer, M,
- Debu, P,
- Dibon, H,
- Doble, N,
- Dosanjh, R S,
- Duclos, J,
- Eppard, K,
- Eppard, M,
- Falaleev, V,
- Fantechi, R,
- Fayard, L,
- Fischer, G,
- Formica, A,
- Fox, H,
- Frabetti, P L,
- Gatignon, L,
- Gershon, T J,
- Gianoli, A,
- Giudici, S,
- Gonidec, A,
- Gorini, B,
- Govi, G,
- Grafstrm, P,
- Granier De Cassagnac, R,
- Graziani, G,
- Hay, B,
- Holder, M,
- Iacopini, E,
- Iconomidou-Fayard, L,
- Imbergamo, E,
- Jeitler, M,
- Kalmus, G E,
- Kalter, A,
- Kekelidze, V D,
- Khristov, P Z,
- Kleinknecht, K,
- Knowles, I,
- Koch, U,
- Kubischta, O W,
- Köpke, L,
- Lacourt, A,
- Lazzeroni, C,
- Lenti, M,
- Litov, L,
- Lopes Da Silva, P,
- Lubrano, P,
- Madigozhin, D T,
- Maier, A,
- Mannelli, I,
- Marchetto, F,
- Markytan, M,
- Marouelli, P,
- Martin, V,
- Martini, M,
- Mazzucato, E,
- Menichetti, E,
- Mestvirishvili, A,
- Mikulec, I,
- Molokanova, N A,
- Munday, D J,
- Nappi, A,
- Nassalski, J P,
- Neuhofer, G,
- Norton, A,
- Ocariz, J,
- Olaiya, E,
- Palestini, S,
- Panzer-Steindel, B,
- Parker, M A,
- Pastrone, N,
- Pellmann, I,
- Pepé, M,
- Pernicka, M,
- Peters, A,
- Petrucci, F,
- Peyaud, B,
- Piccini, M,
- Pierazzini, G M,
- Potrebenikov, Yu K,
- Renk, B,
- Rondio, E,
- Ruggiero, G,
- Sacco, R,
- Savrié, M,
- Schmidt, S A,
- Schué, Yu,
- Schönharting, V,
- Sozzi, M,
- Stoynev, S,
- Szleper, M,
- Taureg, H,
- Taurok, A,
- Turlay, R,
- Unal, G,
- Vallage, B,
- Velasco, M,
- Veltri, M,
- Wahl, H,
- Walker, A,
- Wanke, R,
- White, T O,
- Widhalm, L,
- Wingerter-Seez, I,
- Winhart, A,
- Wislicki, W,
- Wittgen, M,
- Wotton, S A,
- Wronka, S,
- Zinchenko, A I,
- Ziolkowski, M
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Abstract |
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This paper reports on a new high precision measurement of the form factors of the K_{L}\to \pi^{\pm} \mu^{\mp} \nu_{\mu} decay. The data sample of about 2.3$\times 10^{6}$ events was recorded in 1999 by the NA48 experiment at CERN. Studying the Dalitz plot density we measured a linear, $\lambda^{'}_{+} = (20.5\pm 2.2_{stat} \pm 2.4_{syst})\times 10^{-3}$, and a quadratic, $\lambda^{''}_{+} = (2.6\pm 0.9_{stat} \pm 1.0_{syst})\times 10^{-3}$ term in the power expansion of the vector form factor. No evidence was found for a second order term for the scalar form factor; the linear slope was determined to be $\lambda_{0} = (9.5\pm 1.1_{stat} \pm 0.8_{syst})\times 10^{-3}$. Using a linear fit our results were: $\lambda_{+} = (26.7\pm 0.6_{stat} \pm 0.8_{syst} )\times 10^{-3}$ and, $\lambda_{0} = (11.7\pm 0.7_{stat} \pm 1.0_{syst})\times 10^{-3}$. A pole fit of the form factors yields: $m_V = (905 \pm 9_{stat} \pm 17_{syst})$ MeV/c$^2$ and $m_S = (1400 \pm 46_{stat} \pm 53_{syst})$ MeV/c$^2$. |
Publication details |
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