$ψ (3684)$ Radiative Decays to High-Mass States

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29 September 1975

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

Vol. 35 (13) , 821-824
https://doi.org/10.1103/physrevlett.35.821

Abstract

We present experimental evidence for the existence of the decay

ψ (3684) \to γ χ

,

χ \to 4 π^{\pm}, 6 π^{\pm}, π^{+} π^{-} K^{+} K^{-}, π^{+} π^{-}, and K^{+} K^{-}

. There is clear evidence for at least two

χ

states, one at 3.41 ± 0.01 GeV/

c^{2}

and the other at 3.53±0.02 GeV/

c^{2}

. The

χ (3410)

decays into

π π

and

KK

and thus must have even spin and parity.

Keywords

This publication has 8 references indexed in Scilit:

Observation of the two photon cascade 3.7 → 3.1 + γγ via an intermediate state Pc
Physics Letters B, 1975
Quantum Numbers and Decay Widths of the $ψ (3095)$
Physical Review Letters, 1975
Decay of $ψ (3684)$ into $ψ (3095)$
Physical Review Letters, 1975
Orbital Excitations in Charmonium
Physical Review Letters, 1975
Spectrum of Charmed Quark-Antiquark Bound States
Physical Review Letters, 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
Remarks on the New Resonances at 3.1 and 3.7 GeV
Physical Review Letters, 1975