Regular Article - Theoretical Physics
Production of the meson at the CEPC
Department of Physics, Chongqing University, 401331, Chongqing, People’s Republic of China
2 Chongqing Key Laboratory for Strongly Coupled Physics, 401331, Chongqing, People’s Republic of China
Accepted: 12 March 2022
Published online: 21 March 2022
In this paper, we make a detailed study on the production of the , , , and mesons via the three planned running modes (Z, W, and H) at the future Circular Electron–Positron Collider (CEPC). The fragmentation-function and full nonrelativistic QCD approaches are adopted to calculate the production cross sections. Considering the excited states shall decay to the ground state (e.g. -state) with almost probability, our numerical results show that up to next-to-leading order QCD corrections, there are about events to be accumulated via the Z mode () of the CEPC, but only about and events to be accumulated via the W () and H () modes, respectively. Since the Z mode is the best mode among the three planned modes of the CEPC for studying the production of the , , , and mesons and the differential distributions of these mesons may be measured precisely at this mode, we further present the differential cross sections and via the Z mode of the CEPC.
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