Search for heavy neutrinos in K+ → μ+νμ decays

C. Lazzeroni, N. Lurkin, F. Newson, A. Romano, A. Ceccucci, H. Danielsson, V. Falaleev, L. Gatignon, S. Goy Lopez, B. Hallgren, A. Maier, A. Peters, M. Piccini, P. Riedler, P. L. Frabetti, E. Gersabeck, V. Kekelidze, D. Madigozhin, M. Misheva, N. MolokanovaS. Movchan, Yu Potrebenikov, S. Shkarovskiy, A. Zinchenko, P. Rubin, W. Baldini, A. Cotta Ramusino, P. Dalpiaz, M. Fiorini, A. Gianoli, A. Norton, F. Petrucci, M. Savrié, H. Wahl, A. Bizzeti, F. Bucci, M. Veltri, E. Iacopini, M. Lenti, A. Antonelli, M. Moulson, M. Raggi, T. Spadaro, K. Eppard, M. Hita-Hochgesand, K. Kleinknecht, B. Renk, R. Wanke, A. Winhart, R. Winston, V. Bolotov, V. Duk, E. Gushchin, F. Ambrosino, D. Di Filippo, P. Massarotti, M. Napolitano, V. Palladino, G. Saracino, G. Anzivino, E. Imbergamo, R. Piandani, A. Sergi, P. Cenci, M. Pepe, F. Costantini, N. Doble, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, S. Balev, G. Collazuol, L. Di Lella, S. Gallorini, E. Goudzovski, G. Lamanna, I. Mannelli, G. Ruggiero, C. Cerri, R. Fantechi, S. Kholodenko, V. Kurshetsov, V. Obraztsov, V. Semenov, O. Yushchenko, G. D'Agostini, E. Leonardi, M. Serra, P. Valente, A. Fucci, A. Salamon, B. Bloch-Devaux, B. Peyaud, J. Engelfried, D. Coward, V. Kozhuharov, L. Litov, R. Arcidiacono, S. Bifani, C. Biino, G. Dellacasa, F. Marchetto, T. Numao, F. Retière

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

The NA62 experiment recorded a large sample of K+→μ+νμ decays in 2007. A peak search has been performed in the reconstructed missing mass spectrum. In the absence of a signal, limits in the range 2×10−6 to 10−5 have been set on the squared mixing matrix element |Uμ4|2 between muon and heavy neutrino states, for heavy neutrino masses in the range 300–375 MeV/c2. The result extends the range of masses for which upper limits have been set on the value of |Uμ4|2 in previous production search experiments.

Lingua originaleInglese
pagine (da-a)712-718
Numero di pagine7
RivistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume772
DOI
Stato di pubblicazionePubblicato - 10 set 2017

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