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.

Comments: Version accepted for publication in Chinese Physics C