Inclusive ${\rm Y}(1S,2S,3S)$ photoproduction at the CEPC

Abstract

The inclusive ${\rm Y}(1S,2S,3S)$ photoproduction at the future Circular-Electron-Positron-Collider (CEPC) is studied based on the non-relativistic QCD (NRQCD). Including the contributions from both direct and resolved photons, we present different distributions for ${\rm Y}(1S,2S,3S)$ production and the results show there will be considerable events, which means that a well measurements on the ${\rm Y}$ photoprodution could be performed to further study on the heavy quarkonium physics at electron-positron collider in addition to hadron colliders. This supplement study is very important to clarify the current situation of the heavy quarkonium production mechanism.

Version accepted for publication in Chinese Physics C