Heavy neutrino searches and NA62 status

Nicolas Lurkin, F. Hahn, Kurshetsov,Mb Brunetti, S Trilov, M Lupi,E. Gamberini, R. Marchevski,P. Dalpiaz,B. Hallgren,A Khudyakov,A. Norton, K. Kleinknecht, P Matak,M. Serra, L. Glonti, L. Peruzzo,J. Noël, J. Morant, T. Vassilieva, S. Balev, Palladino,F Gonnella,G. Collazuol, J. Bendotti,M. Raggi, G Lehmann-Miotto,R. Fantechi,M. Santoni,E Pedreschi,M. Vasile,C. Cerri,J Pinzino,F. Ambrosino,A. Ceccucci,Roberto Ammendola,A Sturgess, A. Conovaloff, G Mannocchi,A. Winhart, K Massri,L Pontisso,A Filippi, F. Sargeni, S Ghinescu, N Szilasi, E. Gushchin, O. Yushchenko, Milena Misheva,T. Blazek, S Chiozzi, Likhacheva,G. Saracino,R. Wanke, R. Winston, A Mefodev,T. Numao,A. Shaikhiev, E. Martin Albarran,M. Krivda,J. Engelfried, A. Fucci, M Boretto,A. Antonelli,N. Molokanova,B. Checcucci, Fascianelli,M. Lenti,R. Staley,R Lietava,R Page, Dario Soldi,E. Imbergamo,T. Spadaro, Y Kiryushin,S. Kholodenko,S. Fedotov,G. Corradi,B. Bloch-Devaux,F Cotorobai,S Padolski, J Calvo, M Vormstein, I. Polenkevich, M Medvedeva, F. Marchetto, S. Shkarovskiy, A Kleimenova,I. Neri,M. Fiorini,H. F. Heath,M. Giorgi, G. Maire, B Velghe,A. Ostankov,F. Butin, A. Goncalves Martins, A. Mapelli,M. Perrin-Terrin,J. R. Fry,D. Lomidze, A. Sergi,Yu. Potrebenikov, Ryjov, D. Pietreanu, Duk,P. Cenci,P. Valente, R. Lenci,R. Guida, Elsha, P. Massarotti,P. Petrov, S. Venditti,N Estrada-Tristan,G. Aglieri Rinella,N. De Simone,S. Gallorini, D. Hutchcroft,L. Roscilli,Z Kucerova,J.B. Dainton, P. Lichard, L. Federici,D. Britton,T Capussela, D.J. Munday,R. Ciaranfi,M. Pepe, M. Veltri,A. Kluge,P. Sutcliffe, J. Kaplon,L. Gatignon,G. Latino,A. Salamon, B Dobrich,P. Wertelaers,R. Volpe, J Kunze,G. Ruggiero, O Hutanu, C. Paglia, F Newson, I Azhinenko, M Zamkovsky,R Lollini,M. Napolitano,A. Khotyantsev,S. Martellotti, I. Mannelli,H. O. Danielsson,N Dixon, L Bician,N. Doble,M. Barbanera,G. Khoriauli,L Fulton,R. Piandani, Sugonyaev, C. Biino,F. Raffaelli,A Biagioni, F. Cassese,S Di Lorenzo,A. Cassese, C. Lazzeroni, S. Giudici,M Koval,Y. Kudenko,E. Capitolo,E. Maurice,E. Leonardi, G Paoluzzi,A. Gianoli, R. Arcidiacono,E. Cortina Gil,O Jamet,G D’Agostini, M. Noy, S. Valeri,K Mccormick,I.O. Skillicorn, A Catinaccio, B. Wrona, Bonaiuto,P. Rubin, Samsonov,E. Iacopini,F Herman, J. Degrange, Cerny,Karol Kampf, A Blik, C. Mandeiro, D. Madigozhin, M. Piccini,T. Enik,H. Wahl,A. Cotta Ramusino,E. Menichetti,S. Galeotti, E. Migliore, E. Minucci, M. Morel,M. Moulson, Tim Jones,D. A. Bryman,D. Protopopescu, J Fu, M. Bragadireanu, P. Riedler, L Iacobuzio,R. Aliberti,E Jones, F. Bucci,A. Zinchenko, Kozhuharov, D. Di Filippo, F. Spinella, M. Sozzi,D. Coward, B Angelucci,M Mirra,P. Cooke, F. Perez Gomez, C. Santoni,G. Lamanna,A Lonardo,G. Anzivino,A. Romano, O Chikilev,P Cooper, L. Di Lella, Semenov, P. Jarron, A. Cecchetti,S. Movchan,Georgi Georgiev, Falaleev,G. Salina,C. J. Parkinson, M. Valdata-Nappi, A. Bizzeti, Russo,A. Sotnikov,G Britvich, C. Capoccia, Bolotov, G Nuessle, Kekelidze,E. Goudzovski, T Husek, F. Petrucci,F. Costantini, Obraztsov,L. Litov,D. Tagnani,P Vicini

arXiv: High Energy Physics - Experiment(2017)

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摘要
The NA62 experiment at CERN SPS recorded in 2007 a large sample of $K^+tomu^+nu_mu$ decays. A peak search in the missing mass spectrum of this decay is performed. In the absence of observed signal, the limits obtained on $mathcal{B}(K^+tomu^+nu_h)$ and on the mixing matrix element $|U_{mu4}|^2$ are reported. The upgraded NA62 experiment started data taking in 2015, with the aim of measuring the branching fraction of the $K+topi^+nubar{nu}$ decay. An update on the status of the experiment is presented.
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