Artoisenet, Pierre
[UCL]
Gérard, Jean-Marc
[UCL]
Weyers, Jacques
(eng)
We extend the simple scenario for $\Psi'$ decays suggested a few years ago.
The $c\bar c$ pair in the $\Psi'$ does not annihilate directly into three
gluons but rather survives before annihilating. An interesting prediction is
that a large fraction of all $\Psi'$ decays could originate from the $\Psi' \to
\eta_{c} (3\pi)$ channel which we urge experimentalists to identify. Our model
solves the problem of the apparent hadronic excess in $\Psi'$ decays as well as
the $\rho\pi$ puzzle since, in our view, the two-body decays of the $\Psi'$ are
naturally of electromagnetic origin. Further tests of this picture are
proposed, e.g. $J/\Psi \to b_{1}\eta$.
Comment: 6 pages, no figure
Bibliographic reference |
Artoisenet, Pierre ; Gérard, Jean-Marc ; Weyers, Jacques. Survival before annihilation in Psi-prime decays. (2005) 6 p. pages |
Permanent URL |
http://hdl.handle.net/2078/30977 |