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A Twist-4 Effect in the Parton Evolution Processes |
| RUAN Jian-Hong1,2;ZHU Wei2;LI Guang-Lie1,3 |
| 1Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
2Department of Physics, East China Normal University, Shanghai 200062
3Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
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| Cite this article: |
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RUAN Jian-Hong, ZHU Wei, LI Guang-Lie 2000 Chin. Phys. Lett. 17 865-867 |
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Abstract 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.
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| Keywords:
12.38.Bx
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Published: 01 December 2000
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| PACS: |
12.38.Bx
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(Perturbative calculations)
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