6533b826fe1ef96bd128485c
RESEARCH PRODUCT
Improved search for heavy neutrinos in the decay π→eν
L. S. LittenbergSong ChenDouglas BrymanDouglas BrymanP. GumplingerS. H. KettellR. E. MischkeD. ProtopopescuAhmed HusseinAhmed HusseinY. IgarashiJ. R. ComfortC. MalbrunotAlexis A. Aguilar-arevaloD. Vom BruchS. ItoD. VavilovLeonid KurchaninovM. BlecherMasaharu AokiA. SherLuca DoriaLuca DoriaT. SullivanT. NumaoDave BrittonS. Cuen-rochinsubject
PhysicsPhysics::Instrumentation and Detectors010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologySpectrum (functional analysis)Pontecorvo–Maki–Nakagawa–Sakata matrix01 natural sciencesSpectral linePositron energyNuclear physicsPion0103 physical sciencesHigh Energy Physics::ExperimentInvariant massNeutrino010306 general physicsOrder of magnitudedescription
A search for massive neutrinos has been made in the decay π+→e+ν. No evidence was found for extra peaks in the positron energy spectrum indicative of pion decays involving massive neutrinos (π→e+νh). Upper limits (90% C.L.) on the neutrino mixing matrix element |Uei|2 in the neutrino mass region 60–135 MeV/c2 were set and are an order of magnitude improvement over previous results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-04-17 | Physical Review D |