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A Twist-4 Effect in the Parton Evolution Processes

         
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摘要

Recently, a research group reported that they can fit the F2 data well by using the Altarelli-Parisi evolutionequation with a valence-like initial gluon distribution, which means that we need not consider the high twisteffects 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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  • 来源
    《中国物理快报：英文版》 |2000年第12期|865-867|共3页
  • 作者

    RUAN Jian-Hong; ZHU Wei; LI Guang-Lie;

  • 作者单位

    Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039;

    Department of Physics, East China Normal Universify, Shanghai 200062;

    Department of Physics, East China Normal Universify, Shanghai 200062;

    Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039;

    Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000;

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