/ Experiment-HEP arXiv:1212.3131


Measurement of the branching ratio of the decay $\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$


Batley, J.R. (Cambridge U.) ; Kalmus, G.E. (Cambridge U.) ; Lazzeroni, C. (Cambridge U.) ; Munday, D.J. (Cambridge U.) ; Patel, M. (Cambridge U.) ; Slater, M.W. (Cambridge U.) ; Wotton, S.A. (Cambridge U.) ; Arcidiacono, R. (CERN) ; Bocquet, G. (CERN) ; Ceccucci, A. (CERN) ; Cundy, D. (CERN) ; Doble, N. (CERN) ; Falaleev, V. (CERN) ; Gatignon, L. (CERN) ; Gonidec, A. (CERN) ; Grafstrom, P. (CERN) ; Kubischta, W. (CERN) ; Marchetto, F. (CERN) ; Mikulec, I. (CERN) ; Norton, A. (CERN) ; Panzer-Steindel, B. (CERN) ; Rubin, P. (CERN) ; Wahl, H. (CERN) ; Goudzovski, E. (Dubna, JINR) ; Hristov, P. (Dubna, JINR) ; Kekelidze, V. (Dubna, JINR) ; Kozhuharov, V. (Dubna, JINR) ; Litov, L. (Dubna, JINR) ; Madigozhin, D. (Dubna, JINR) ; Molokanova, N. (Dubna, JINR) ; Potrebenikov, Yu. (Dubna, JINR) ; Stoynev, S. (Dubna, JINR) ; Zinchenko, A. (Dubna, JINR) ; Monnier, E. (Chicago U., EFI) ; Swallow, E.C. (Chicago U., EFI) ; Winston, R. (Chicago U., EFI) ; Sacco, R. (Edinburgh U.) ; Walker, A. (Edinburgh U.) ; Baldini, W. (INFN, Ferrara) ; Dalpiaz, P. (INFN, Ferrara) ; Frabetti, P.L. (INFN, Ferrara) ; Gianoli, A. (INFN, Ferrara) ; Martini, M. (INFN, Ferrara) ; Petrucci, F. (INFN, Ferrara) ; Scarpa, M. (INFN, Ferrara) ; Savrie, M. (INFN, Ferrara) ; Bizzeti, A. (INFN, Florence) ; Calvetti, M. (INFN, Florence) ; Collazuol, G. (INFN, Florence) ; Iacopini, E. (INFN, Florence) ; Lenti, M. (INFN, Florence) ; Ruggiero, G. (INFN, Florence) ; Veltri, M. (INFN, Florence) ; Behler, M. (Mainz U., Inst. Phys.) ; Eppard, K. (Mainz U., Inst. Phys.) ; Eppard, M. (Mainz U., Inst. Phys.) ; Hirstius, A. (Mainz U., Inst. Phys.) ; Kleinknecht, K. (Mainz U., Inst. Phys.) ; Koch, U. (Mainz U., Inst. Phys.) ; Masetti, L. (Mainz U., Inst. Phys.) ; Marouelli, P. (Mainz U., Inst. Phys.) ; Moosbrugger, U. (Mainz U., Inst. Phys.) ; Morales Morales, C. (Mainz U., Inst. Phys.) ; Peters, A. (Mainz U., Inst. Phys.) ; Wanke, R. (Mainz U., Inst. Phys.) ; Winhart, A. (Mainz U., Inst. Phys.) ; Dabrowski, A. (Northwestern U.) ; Fonseca Martin, T. (Northwestern U.) ; Velasco, M. (Northwestern U.) ; Anzivino, G. (INFN, Perugia) ; Cenci, P. (INFN, Perugia) ; Imbergamo, E. (INFN, Perugia) ; Lamanna, G. (INFN, Perugia) ; Lubrano, P. (INFN, Perugia) ; Michetti, A. (INFN, Perugia) ; Nappi, A. (INFN, Perugia) ; Pepe, M. (INFN, Perugia) ; Petrucci, M.C. (INFN, Perugia) ; Piccini, M. (INFN, Perugia) ; Valdata, M. (INFN, Perugia) ; Cerri, C. (INFN, Pisa) ; Costantini, F. (INFN, Pisa) ; Fantechi, R. (INFN, Pisa) ; Fiorini, L. (INFN, Pisa) ; Giudici, S. (INFN, Pisa) ; Mannelli, I. (INFN, Pisa) ; Pierazzini, G. (INFN, Pisa) ; Sozzi, M. (INFN, Pisa) ; Cheshkov, C. (DSM, DAPNIA, Saclay) ; Cheze, J.B. (DSM, DAPNIA, Saclay) ; De Beer, M. (DSM, DAPNIA, Saclay) ; Debu, P. (DSM, DAPNIA, Saclay) ; Gouge, G. (DSM, DAPNIA, Saclay) ; Marel, G. (DSM, DAPNIA, Saclay) ; Mazzucato, E. (DSM, DAPNIA, Saclay) ; Peyaud, B. (DSM, DAPNIA, Saclay) ; Vallage, B. (DSM, DAPNIA, Saclay) ; Holder, M. (Siegen U.) ; Maier, A. (Siegen U.) ; Ziolkowski, M. (Siegen U.) ; Bifani, S. (INFN, Turin) ; Biino, C. (INFN, Turin) ; Cartiglia, N. (INFN, Turin) ; Clemencic, M. (INFN, Turin) ; Goy Lopez, S. (INFN, Turin) ; Menichetti, E. (INFN, Turin) ; Pastrone, N. (INFN, Turin) ; Wislicki, W. (Warsaw, Inst. Nucl. Studies) ; Dibon, H. (Vienna, OAW) ; Jeitler, M. (Vienna, OAW) ; Markytan, M. (Vienna, OAW) ; Neuhofer, G. (Vienna, OAW) ; Widhalm, L. (Vienna, OAW)

Abstract: From 56 days of data taking in 2002 with a neutral kaon beam, the NA48/1 experiment observed 97 $\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$ candidates with a background contamination of $30.8 \pm 4.2$ events. From this sample, the BR($\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$) is measured to be $(2.17 \pm 0.32_{\mathrm{stat}}\pm 0.17_{\mathrm{syst}})\times10^{-6}$.

Web-Page: http://inspirehep.net/record/1207262/files/arXiv:1212.3131.pdf; http://inspirehep.net/record/1207262/files/final_030912.png; http://inspirehep.net/record/1207262/files/mueff.png

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