Search for a heavy neutrino state in the decay π+→μ++νμ

Autor:	R. Frosch, Ch. Brönnimann, C. Wigger, P.R. Kettle, Ketevi Assamagan, M. Daum
Rok vydání:	1998
Předmět:	Physics Nuclear and High Energy Physics Particle physics Range (particle radiation) Muon Spectrometer Branching fraction State (functional analysis) Momentum Nuclear physics Physics::Accelerator Physics High Energy Physics::Experiment Neutrino Heavy neutrino
Zdroj:	Physics Letters B. 434:158-162
ISSN:	0370-2693
Popis:	We have searched for an admixture of a heavy neutrino state νx in the decay π+→μ++νμ by analyzing the momentum spectrum of a surface muon beam in a magnetic spectrometer. No indications for such a neutrino state were found. In the mass range 0.53 MeV ≤mνx≤ 1.0 MeV, not covered by previous experiments, we obtain upper limits of the branching fraction Γ(π+→μ+νx)/[Γ(π+→μ+ν2)+Γ(π+→μ+νx)] between 22 % and 1.6 % (c.l.=0.9).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b09ac08e73f2f34d8c21af7638558e8 https://doi.org/10.1016/s0370-2693(98)00727-8 Zobrazit plný text záznamu Full Text from ScienceDirect