摘要
Recently,a research group reported that they can fit the F2 data well by using the Altarelli-Parisi evolution equation with a valence-like initial gluon distribution,which means that we need not consider the high twist effects in the proton.In this letter,we point out that their valence-like initial gluon distribution is unreasonable for the proton structure function.With the reasonable initial distributions,we find that the high twist corrections to the Altarelli-Parisi evolution equation is necessary.
作者
RUAN Jian-Hong
ZHU Wei
LI Guang-Lie
阮建红;朱伟;厉光烈(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039;Department of Physics,East China Normal University,Shanghai 200062;Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000)
基金
Supported in part by the National Natural Sicence Foundation of China under Grant Nos.19775051,19775014 and 19875024.
