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.
Inclusive γ-Ray Spectra from ψ(3095) and ψ^{′}(3684) Decays
LIVAN, MICHELE;
1977-01-01
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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
