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

2012/02/13 by A. I. Ahmadov, C. Aydin, F. Keskin · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.85.034009

published as Phys. Rev. D85, 034009, 2012 · 21 pages, 15 figures. arXiv admin note: text overlap with arXiv:0709.2072 by other authors

arxiv created 2012/02/13 · arxiv updated 2015/06/04

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 frozen coupling approach a higher-twist contribution to the photon-photon collisions cross section is normalized in terms of the pion electromagnetic form factor.

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