Searches for heavy neutral lepton production in K+ → e+N and K+ → μ+N decays using the data set collected by the NA62 experiment at CERN in 2016-18 are presented. Upper limits on the elements of the extended neutrino mixing matrix |Ue4|2 and |Uμ4|2 are established at the levels of 10−9 and 10−8, respectively, improving on the earlier searches for heavy neutral lepton production and decays in the kinematically accessible mass range
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by...
A search for heavy neutral lepton production in decays using a data sample collected with a minimum ...
Searches for heavy neutral lepton production in K+ → e+N and K+ → μ+N decays using the data set coll...
A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by...
Searches for heavy neutral lepton production in K+ ? e+N and K+ ? µ+N decays using the data set coll...
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in K+ -> mu N+ and K+ -> e(+)N decays is carr...
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in decays using the data sample collected by the NA...
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by...
A search for heavy neutral lepton production in decays using a data sample collected with a minimum ...
Searches for heavy neutral lepton production in K+ → e+N and K+ → μ+N decays using the data set coll...
A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by...
Searches for heavy neutral lepton production in K+ ? e+N and K+ ? µ+N decays using the data set coll...
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in K+ -> mu N+ and K+ -> e(+)N decays is carr...
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in decays using the data sample collected by the NA...
A search for heavy neutral lepton production in K+ decays using a data sample collected with a minim...
A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by...
A search for heavy neutral lepton production in decays using a data sample collected with a minimum ...