Inclusive γ -Ray Spectra from ψ ( 3095 ) and ψ ′ ( 3684 ) Decays

Inclusive ..gamma..-ray spectra from psi (3095) and psi' (3684) decays have been observed with segmented arrays of NaI(Tl) in an e/sup +/e/sup -/ colliding-beam experiment. Three major peaks are seen in the psi' spectrum corresponding to psi' ..-->.. chi..gamma.. with m/sub x/ = 35...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1977-01, Vol.38 (23), p.1324-1327
Hauptverfasser:	Biddick, C. J., Burnett, T. H., Masek, G. E., Miller, E. S., Smith, J. G., Stronski, J. P., Sullivan, M. K., Vernon, W., Badtke, D. H., Barnett, B. A., Jones, L. H., Zorn, G. T., Cavalli-Sforza, M., Goggi, G., Impellizzeri, F. S., Livan, M. M., Pastore, F. H., Rossini, B., Aschman, D. G., Coyne, D. G., Groom, D. E., O'Neill, G. K., Sadrozinski, H. F. W., Shinsky, K. A., Keller, L. P., Lyon, D. E., Ford, R. L., Hilger, E., Hofstadter, R., Hughes, E. B., Martin, T. W., O'Neill, L. H., Simpson, J. W.
Format:	Artikel
Sprache:	eng
Schlagworte:	645101 - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties BEAMS BOSONS BRANCHING RATIO CHI RESONANCES CHI-3410 RESONANCES CHI-3500 RESONANCES CHI-3550 RESONANCES COLLIDING BEAMS DECAY ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES GAMMA SPECTRA HADRONS INCLUSIVE INTERACTIONS INTERACTIONS LEPTON-LEPTON INTERACTIONS MASS MESON RESONANCES MESONS PARTICLE INTERACTIONS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PSI RESONANCES PSI-3105 RESONANCES PSI-3695 RESONANCES RESONANCE PARTICLES SPECTRA VECTOR MESONS
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Beschreibung
Zusammenfassung:	Inclusive ..gamma..-ray spectra from psi (3095) and psi' (3684) decays have been observed with segmented arrays of NaI(Tl) in an e/sup +/e/sup -/ colliding-beam experiment. Three major peaks are seen in the psi' spectrum corresponding to psi' ..-->.. chi..gamma.. with m/sub x/ = 3561, 3511, and 3413 MeV/c/sup 2/ and with branching fractions of (7.0 +- 2.0), (7.1 +- 1.9), and (7.2 +- 2.3) %, respectively. Enhancements in the psi' spectrum at higher energies are consistent with decays chi ..-->.. psi..gamma... The psi spectrum shows no statistically significant structure.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.38.1324