Higher-twist effects in the direct photon production and the role of infrared renormalons


Ahmadov A. I. , AYDIN C. , UZUN Ö.

PHYSICAL REVIEW D, vol.87, no.1, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 87 Issue: 1
  • Publication Date: 2013
  • Doi Number: 10.1103/physrevd.87.014006
  • Title of Journal : PHYSICAL REVIEW D

Abstract

We calculate the contribution of the higher-twist effects to the large-p(T) inclusive single direct photon production cross section in pi p collisions in the running coupling and frozen coupling approaches within holographic QCD. We obtain the structure of infrared renormalon singularities of the higher-twist subprocess cross section. For a full analysis 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. DOI: 10.1103/PhysRevD.87.014006