Observation of η' --> μ+μ-γ decay
Abstract
The mass spectrum for μ+μ-γ systems produced in π-p interactions at 25 and 33 GeV/c has been studied. To detect muon pairs and photons a wide-aperture magnetic spectrometer and a hodoscope γ-detector were used. In the mass spectrum a clear peak is seen corresponding to the decay η' --> μ+μ-γ not previously observed. The branching ratio for this decay, 8 × 10-5, is in agreement with the η' form-factor model, based on vector dominance.
- Publication:
-
Physics Letters B
- Pub Date:
- December 1979
- DOI:
- 10.1016/0370-2693(79)90490-8
- Bibcode:
- 1979PhLB...88..379D