Inclusive γ-Ray Spectra from ψ(3095) and ψ'(3684) Decays
Abstract
Inclusive γ-ray spectra from ψ(3095) and ψ'(3684) decays have been observed with segmented arrays of NaI(Tl) in an e+e- colliding-beam experiment. Three major peaks are seen in the ψ' spectrum corresponding to ψ'-->χγ with mχ=3561, 3511, and 3413 MeV/c2 and with branching fractions of (7.0+/-2.0), (7.1+/-1.9), and (7.2+/-2.3)%, respectively. Enhancements in the ψ' spectrum at higher energies are consistent with decays χ-->ψγ. The ψ spectrum shows no statistically significant structure.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 1977
- DOI:
- 10.1103/PhysRevLett.38.1324
- Bibcode:
- 1977PhRvL..38.1324B
- Keywords:
-
- Decay Rates;
- Gamma Rays;
- Radiation Detectors;
- X Ray Spectra;
- Background Radiation;
- Cosmic Rays;
- Histograms;
- X Ray Spectroscopy;
- Nuclear and High-Energy Physics