摘要
Within the framework of nonrelativistic-QCD factorization,we calculate both the next-to-leading-order relativistic and QCD corrections to prompt J/ψpair production,with feed-down fromψ(2S)mesons,via photon-photon collisions at future e^(+)e^(−)colliders,including the Future Circular Lepton Collider(FCC-ee),the Circular Electron Positron Collider(CEPC),and the Compact Linear Collider(CLIC).We present total cross sections and distributions in single J/ψtransverse momentum and rapidity,as well as in J/ψpair invariant mass.The relativistic and QCD corrections both turn out to be large and negative.However,the production rates are large enough for useful experimental studies.
基金
Supported in part by the German Research Foundation DFG through Research Unit FOR 2926"Next Generation Perturbative QCD for Hadron Structure:Preparing for the Electron-Ion Collider"(409651613)
National Natural Science Foundation of China(12061131006)
National Natural Science Foundation of China(U1832160,12075177)。
