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Contributions of gluon recombination to saturation phenomena

Wei Zhu, Jianhong Ruan, Jifeng Yang, and Zhenqi Shen

  • Department of Physics, East China Normal University, Shanghai 200062, People’s Republic of China

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Phys. Rev. D 68, 094015 – Published 19 November, 2003

DOI: https://doi.org/10.1103/PhysRevD.68.094015

Abstract

Parton distributions in the small x region are numerically predicted by using a modified Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) equation with Glück-Reya-Vogt (GRV)-like input distributions. We find that gluon recombination at the twist-4 level obviously suppresses the rapid growth of parton densities with x decreasing. We show that before the saturation scale Qs2 is reached, saturation and partial saturation appear in the small x behavior of parton distributions in the nucleus and free proton, respectively. The antishadowing contributions to the saturation phenomena are also discussed.

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Phys. Rev. D 68, 094015– Published 19 November, 2003
  • Received 6 June 2003

© 2003 American Physical Society

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