Factorization of large-x quark distributions in a hadron

  • Ji X
  • Ma J
  • Yuan F
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Abstract

We present a factorization formula for valence quark distributions in a hadron in x→1 limit. For the example of pion, we arrive at the form of factorization by analyzing momentum flow in the leading and high-order Feynman diagrams. The result confirms the well-known 1-x scaling rule to all orders in perturbation theory, providing the nonperturbative matrix elements for the infrared divergence factors. We comment on resummation of perturbative single and double logarithms in 1-x. © 2005 Elsevier B.V. All rights reserved.

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Authors

  • Xiangdong Ji

  • Jian Ping Ma

  • Feng Yuan

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