New derivation of the altarelli-Parisi equations

J. C. Collins, Jianwei Qiu

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

The Altarelli-Parisi equations are derived without using (1-z)+ regularization and (1-z) function insertion. We find that virtual diagrams from renormalization give a negative contribution to parton evolution and the effect of these virtual diagrams is equivalent to that of some real diagrams with opposite sign. In this new approach, momentum conservation and valence-quark-number conservation of parton-number densities are satisfied automatically. A consistent probabilistic picture of parton evolution inside a hadron is also given. 1989 The American Physical Society.

Original languageEnglish (US)
Pages (from-to)1398-1408
Number of pages11
JournalPhysical Review D
Volume39
Issue number5
DOIs
StatePublished - Jan 1 1989

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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