4 papers
Two loop QCD corrections to in asymptotic expansion
Cong Li, Xu-Dong Huang, Wen-Long Sang
Within the framework of NRQCD, the short-distance coefficients (SDCs) for the process have been obtained up to NNLO in asymptotic expansions over $r={16m_c^2}…
The next-to-next-to-leading-order QCD corrections to at B factories
Cong Li, Wen-Long Sang, Hong-Fei Zhang
We investigate the processes and at B factories within the NRQCD factorization framework, computing the corresponding helicity amplitudes…
Perturbative QCD Evidence for Spin-2 Particles in the Di- Resonances
Hong-Fei Zhang, Yan-Qing Ma, Wen-Long Sang
We extend the nonrelativistic QCD framework to explore the nature of the newly discovered di- resonances. Assuming them as either molecule-like states or tetraquarks, we calc…
Revisiting the line shape of $e^+e^-\to \jpsi η$ cross section
Chang-Man Gan, Jun-Kang He, Wen-Long Sang +1
We calculate the cross sections for the processes $e^+e^-\to \jpsi η$ and $e^+e^-\to \jpsi η^\prime$ at various CM energies . We first predict these cross sections by c…