Abstract
We investigate the possibility to study the charmoniumlike state through the pion-induced production off a nuclear target. By using a high-energy pion beam, the can be produced off a proton or nucleus though the Primakoff effect. The production amplitude is calculated in an effective Lagrangian approach combined with the vector dominance model. The total cross sections of the and reactions are calculated, and their order of magnitude is about 0.1 and 0.01 nb, respectively, with an assumption of branch ratio 10% for the decay in channel. If the proton target is replaced by a nuclear target, the production of the enhances obviously. The predicted total cross sections for the and reactions with or are on the order of magnitude of 100 and 10 nb, respectively, which is about one thousand times larger than the cross sections off a proton target. Based on these results, we suggest the experimental study of the by using high-energy pion beams with a nuclear target at facilities such as COMPASS and J-PARC.
- Received 6 December 2015
DOI:https://doi.org/10.1103/PhysRevD.93.034022
© 2016 American Physical Society