Evidence for Direct $γ$ Production at Large $x$ in $ψ (3100)$ Decay

Publisher Website

11 February 1980

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

Vol. 44 (6) , 367-370
https://doi.org/10.1103/physrevlett.44.367

Abstract

The inclusive

γ

and

π^{0}

momentum spectra from

ψ (3100)

decay have been measured in

e^{+} e^{-}

annihilation at SPEAR. When the

γ

spectrum is compared with that expected from

π^{0}

decay, an excess of high-momentum

γ' s

is observed. This excess is compared with that predicted by quantum chromodynamics for the decay of the

ψ

into a

γ

and two gluons.

Keywords

This publication has 13 references indexed in Scilit:

Review of particle properties: Particle data group
Physics Letters B, 1978
Inclusive $η$ Production at Large Transverse Momenta
Physical Review Letters, 1978
The decay of the upsilon into photons and gluons
Physics Letters B, 1978
Observation of $D^{0}$ -Meson Decay into $K^{-} π^{+} π^{0}$
Physical Review Letters, 1978
Electron-Muon and Electron-Hadron Production in $e^{+} e^{-}$ Collisions
Physical Review Letters, 1977
Radiative decays of the and evidence for a new heavy resonance
Physics Letters B, 1977
Momentum spectra of charged hadrons from the decays of Jψ and ψ'
Physics Letters B, 1976
Comment on the decay ofψ(3.1)into even-G- parity states
Physical Review D, 1975
Spectroscopy of the New Mesons
Physical Review Letters, 1975
Measurement of $e^{+} e^{-} \to e^{+} e^{-}$ and $e^{+} e^{-} \to μ^{+} μ^{-}$
Physical Review Letters, 1975