Direct Photon Production in Pion-Proton Collisions

24th International Conference on Integrable Systems and Quantum symmetries

Ahmadov, A.I.^1 ; Aydin, C.^2 ; Uzun, O.^2

Department of Theoretical Physics, Baku State University, Z. Khalilov st. 23, Baku

AZ-1148, Azerbaijan^1

Department of Physics, Karadeniz Technical University, Trabzon

61080, Turkey^2

关键词: Direct photons;    Feynman diagrams;    Higher twists;    Proton collisions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/804/1/012001/pdf
DOI  :  10.1088/1742-6596/804/1/012001

来源: IOP

【 摘 要 】

In this article we calculate the contribution of the higher-twist Feynman diagrams to the large-pTinclusive single direct photon production cross section in πp collisions in case of the running coupling and frozen coupling approaches within holographic QCD. We determined the structure of infrared renormalon singularities of the higher-twist subprocess cross section. Also compared and analyzed the resummed higher-twist cross sections with the ones obtained in the framework of the frozen coupling approach.