| アブストラクト: |
We study the initial state radiation process e+e- -> J/psi}+X+gamma for J/psi production at B factory, and find the cross section is 61% larger than it's Born one for color octet part and is about half as it's Born one for color singlet part. Furthermore, the color singlet and color octet signal are very clearly separated in its
E_gamma spectra due to kinematics difference. We suggest to measure this E_gamma spectra at B factory to determine the color octet effect. |
