6533b7d0fe1ef96bd125a326
RESEARCH PRODUCT
Search for heavy neutrinos in \(\pi ^{ + } \to \mu ^{ + }\nu \) decay and status of lepton universality test in the PIENU experiment
T. NumaoDouglas BrymanDouglas BrymanChloé MalbrunotChloé MalbrunotP. GumplingerS. Cuen-rochinDave BrittonAhmed HusseinAhmed HusseinA. SherD. ProtopopescuJ. R. ComfortL. S. LittenbergT. SullivanT. SullivanY. IgarashiR. E. MischkeLeonid KurchaninovSong ChenS. ItoS. ItoS. H. KettellD. Vom BruchD. Vom BruchM. BlecherAlexis A. Aguilar-arevaloLuca DoriaLuca DoriaD. VavilovMasaharu Aokisubject
PhysicsParticle physicsMuonpi+ --> muon+ neutrinopi: decayneutrino: heavy: search forUniversality (philosophy)Pontecorvo–Maki–Nakagawa–Sakata matrixkineticenergy spectrumKinetic energyPion[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]High Energy Physics::ExperimentNeutrinoneutrino: mixingOrder of magnitudeParticle Physics - ExperimentLeptonexperimental resultslepton: universalitydescription
International audience; In the present work of the PIENU experiment, heavy neutrinos were sought in pion decays \(\pi ^{ + } \to \mu ^{ + }\nu \). No evidence for extra peak was found in the muon kinetic energy spectrum and 90% confidence level upper limits were set on the neutrino mixing matrix \(|U_{\mu i}|^{2}\) in the mass range of 15.7 to 33.8 MeV/c^2, improving an order of magnitude over previous experiments. Current status of lepton universality test is also reported.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-09-23 |