https://doi.org/10.1140/epja/i2009-10879-1
Regular Article - Theoretical Physics
Charmonium rescattering effects in 
(2S) 
decay
1
School of Physical Science and Technology, Southwest University, 400715, Chongqing, PRC
2
Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918(1), 100049, Beijing, PRC
* e-mail: chenh@swu.edu.cn
Received:
12
July
2009
Revised:
10
August
2009
Accepted:
20
September
2009
Published online:
4
October
2009
Charmonium rescattering effects in the M1 transition of (2S)
are investigated by modeling a 
or J/ rescattering into a final state. The absorptive and dispersive part of the transition amplitudes for the rescattering loops of 
(
) and
() are separately evaluated. The numerical results show that the contribution from the
() rescattering process is negligible. Compared with the virtual D
(D
*) rescattering processes, the
() process may be regarded as the next-leading order of the hadronic loop mechanism, which only offers the partial decay width of ∼ 0.045 keV to the (2S)
.
PACS: 13.20.Gd Decays of J/ , 
, and other quarkonia – / 12.39.Mk Glueball and nonstandard multi-quark/gluon states – / 13.30.Eg Hadronic decays –
© SIF, Springer-Verlag Berlin Heidelberg, 2009
