Observation of a Resonance at 4.4 GeV and Additional Structure near 4.1 GeV in $e^{+} e^{-}$ Annihilation

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29 March 1976

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 36 (13), 700-703
https://doi.org/10.1103/physrevlett.36.700

Abstract

We observe a resonancelike structure in the total cross section for hadron production by

e^{+} e^{-}

colliding beams at a mass of 4414 ± 7 MeV having a total width

Γ = 33 \pm 10

MeV. From the area under this resonance, we deduce the partial width to electron pairs to be

Γ_{ee} = 440 \pm 140

eV. Further structure of comparable width is present near 4.1 GeV.

Keywords

This publication has 6 references indexed in Scilit:

Electron-positron annihilation cross section near the new threshold
Physical Review D, 1975
Quantum Numbers and Decay Widths of the $ψ (3684)$
Physical Review Letters, 1975
Initial-state radiative and resolution corrections and resonance parameters in e+e− annihilation
Nuclear Instruments and Methods, 1975
Quantum Numbers and Decay Widths of the $ψ (3095)$
Physical Review Letters, 1975
Total Cross Section for Hadron Production by Electron-Positron Annihilation between 2.4 and 5.0 GeV Center-of-Mass Energy
Physical Review Letters, 1975
Measurement of $e^{+} e^{-} \to e^{+} e^{-}$ and $e^{+} e^{-} \to μ^{+} μ^{-}$
Physical Review Letters, 1975

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