【正文】
F of Heavy Quark ? With the generalized factorization theorem we obtain the semi inclusive hadronic tensor: The modified effective fragmentation function is 15 BenWei Zhang, ICHEP’04, Beijing Twoparton Correlation Function Twist4 parton correlation function is in principle not calculable. With some approximations we can estimate the twist4 correlation functions approximated as J. Osborne and XinNian Wang, NPA 710(2020)281 16 BenWei Zhang, ICHEP’04, Beijing Heavy Quark Energy Loss Heavy quark energy loss can be derived as: Xiaofen Guo, XinNian Wang, PRL 85(2020)3591。 XinNian Wang, Xiaofen Guo, NPA 696(2020) 788 BenWei Zhang, XinNian Wang, NPA 720(2020) 429 When M=0, we will recover the result of the light quark energy loss. 17 BenWei Zhang, ICHEP’04, Beijing Two Distinct Limits (1) When 2^(2) For large values of Q2 or small xB, we have 18 BenWei Zhang, ICHEP’04, Beijing Nuclear Size Dependence 19