TY - JOUR

T1 - Search for heavy neutrinos in K+→μ+νμ decays

AU - Lazzeroni, C.

AU - Ruggiero, Giuseppe

AU - NA62 Collaboration

PY - 2017/9/10

Y1 - 2017/9/10

N2 - 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.

AB - 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.

KW - Kaon decays

KW - Heavy neutrinos

U2 - 10.1016/j.physletb.2017.07.055

DO - 10.1016/j.physletb.2017.07.055

M3 - Journal article

VL - 772

SP - 712

EP - 718

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - Supplement C

ER -