Pion wave functions from holographic QCD and the role of infrared renormalons in photon-photon collisions

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Ahmadov A. I., AYDIN C., KESKIN F.

PHYSICAL REVIEW D, vol.85, no.3, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 85 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1103/physrevd.85.034009
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Karadeniz Technical University Affiliated: Yes

Abstract

In this article, we calculate the contribution of the higher-twist Feynman diagrams to the large-p(T) inclusive single pion production cross section in photon-photon collisions in case of the running coupling and frozen coupling approaches within holographic QCD. We compare the resummed higher-twist cross sections with the ones obtained in the framework of the frozen coupling approach and leading-twist cross section. Also, we show that in the context of the frozen coupling approach a higher-twist contribution to the photon-photon collisions cross section is normalized in terms of the pion electromagnetic form factor.