https://doi.org/10.1140/epjc/s10052-015-3781-2
Regular Article - Theoretical Physics
in the diquarkonium picture
1
School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
2
INFN Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044, Frascati, Italy
3
Dipartimento di Fisica and INFN, Sapienza Università di Roma, P. Aldo Moro 2, 00185, Rome, Italy
* e-mail: luciano.maiani@cern.ch
Received:
13
October
2015
Accepted:
5
November
2015
Published online:
24
November
2015
The observed decay is a natural consequence of the diquark–antidiquark description of Y and X resonances. In this note we attempt an estimate of the transition rate through a non-relativistic calculation of the electric dipole term of a diquarkonium bound state. Combining with BESIII data, upper bounds to 
and to 
are obtained. We expect to confront these results with forthcoming data from electron–positron and hadron colliders.
© SIF and Springer-Verlag Berlin Heidelberg, 2015
