Role of the scalar in the process * *Supported by the National Natural Science Foundation of China (12192263), the Natural Science Foundation of Henan Province, China (222300420554), the Project of Youth Backbone Teachers of Colleges and Universities of Henan Province, China (2020GGJS017), the Youth Talent Support Project of Henan Province, China (2021HYTP002), and the Open Project of Guangxi Key Laboratory

Abstract

Based on BESIII measurements of the reaction , we investigate this process by considering the S-wave pseudoscalar-pseudoscalar interaction within the unitary chiral approach and the contributions from the intermediate resonances and . Our calculation can reasonably reproduce the experimental data, and our results imply that , which is dynamically generated from the S-wave pseudoscalar-pseudoscalar interaction, plays an important role in this process, and the contributions from the intermediate resonances and are also necessary. More precise measurements of this process in future can shed light on the nature of and .