Regular Article - Theoretical Physics
Further studies on the exclusive productions of () via annihilation at the B factories
Department of Physics, Guizhou Minzu University, Guiyang, 550025, People’s Republic of China
* e-mail: email@example.com
Accepted: 27 October 2018
Published online: 2 November 2018
By including the interference effect between the QCD and the QED diagrams, we carry out a complete analysis on the exclusive productions of () at the B factories with GeV at the next-to-leading-order (NLO) level in , within the nonrelativistic QCD framework. It is found that the -order terms that represent the tree-level interference are comparable with the usual NLO QCD corrections, especially for the and cases. To explore the effect of the higher-order terms, namely , we perform the QCD corrections to these -order terms for the first time, which are found to be able to significantly influence the -order results. In particular, in the case of and , the newly calculated -order terms can to a large extent counteract the contributions, evidently indicating the indispensability of the corrections. In addition, we find that, as the collision energy rises, the percentage of the interference effect in the total cross section will increase rapidly, especially for the case.
© The Author(s), 2018