NA48/62 latest results

Radoslav Marchevski, R. Aliberti, F. Ambrosino, R. Ammendola, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, M. Barbanera, A. Biagioni, L. Bician, C. Biino, A. Bizzeti, T. Blazek, B. Bloch-Devaux, V. Bonaiuto, M. Boretto, M. Bragadireanu, F. Brizioli, M. B. BrunettiD. Bryman, F. Bucci, T. Capussela, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, B. Checcucci, A. Conovaloff, E. Cortina Gil, M. Corvino, F. Costan-tini, A. Cotta Ramusino, D. Coward, G. D’Agostini, J. Dainton, P. Dalpiaz, H. Danielsson, N. De Simone, D. Di Filippo, L. Di Lella, N. Doble, B. Dobrich, F. Duval, V. Duk, J. Engelfried, T. Enik, H. Heath, R. Page, S. Trilov, NA62 Collaboration

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Abstract

The NA62 experiment at the CERN SPS recorded in 2007 a large sample of K+ ? µ+?µ decays. A peak search in the missing mass spectrum of this decay is performed. In the absence of observed signal, the limits obtained on B(K+ ? µ+?h) and on the mixing matrix element |Uµ 4| are reported. The upgraded NA62 experiment started data taking in 2015. About 5×1011K+ decays have been recorded so far to measure the branching ratio of the K+ ? ?+?? decay. Preliminary results from the K+ ? ?+?? analysis based on about 5% of the 2016 statistics are reported.

Original languageEnglish
JournalProceedings of Science
Volume2017-June
Early online date23 Oct 2017
DOIs
Publication statusPublished - 8 Nov 2017

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    Marchevski, R., Aliberti, R., Ambrosino, F., Ammendola, R., Angelucci, B., Antonelli, A., Anzivino, G., Arcidiacono, R., Barbanera, M., Biagioni, A., Bician, L., Biino, C., Bizzeti, A., Blazek, T., Bloch-Devaux, B., Bonaiuto, V., Boretto, M., Bragadireanu, M., Brizioli, F., ... NA62 Collaboration (2017). NA48/62 latest results. Proceedings of Science, 2017-June. https://doi.org/10.22323/1.304.0004