Measurement of the muon momentum in pion decay at rest using a surface muon beam
Jun, 1994
16 pages
Published in:
- Phys.Lett.B 335 (1994) 231-236
Report number:
- PSI-PR-94-19
Experiments:
- PSI-CYCLOTRON
Citations per year
Abstract: (Elsevier)
We have measured the momentum of muons from the decay π + → μ + ν μ at rest to be p μ + = 29.79207±0.00012 MeV/c. This result leads to a laboratory upper limit of 0.16 MeV ( CL = 0.9) for the muon-neutrino mass. The cosmological upper limit of the neutrino mass, the muon mass and the new p μ + -value yield the pion mass m π + = 139.57031 ± 0.00016 MeV. The mean kinetic energy of the pions stopped in the isotropic-graphite production target immediately before their decay is found to be T π + = 0.415 ± 0.027 eV .- p nucleus: inclusive reaction
- carbon: surface
- pi+: hadroproduction
- hadroproduction: pi+
- pi+: leptonic decay
- leptonic decay: pi+
- muon+: momentum
- upper limit
- pi+: mass
- mass: pi+
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