6533b82dfe1ef96bd1290fba

RESEARCH PRODUCT

Improved search for heavy neutrinos in the decay π→eν

A. Aguilar-arevaloM. AokiM. BlecherD.i. BrittonD. Vom BruchD.a. BrymanS. ChenJ. ComfortS. Cuen-rochinL. DoriaP. GumplingerA. HusseinY. IgarashiS. ItoS. KettellL. KurchaninovL.s. LittenbergC. MalbrunotR.e. MischkeT. NumaoD. ProtopopescuA. SherT. SullivanD. Vavilov

subject

Physics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::PhenomenologyHigh Energy Physics::Experiment

description

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.

yearjournalcountryeditionlanguage
2018-04-17
https://eprints.gla.ac.uk/169177/1/169177.pdf