Pion wave functions from holographic QCD and the role of infrared renormalons in photon-photon collisions
| Autor: | Ahmadov, A. I., Aydin, C., Keskin, F. |
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| Rok vydání: | 2012 |
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| Zdroj: | Phys. Rev. D85, 034009, 2012 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.85.034009 |
| Popis: | 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. Comment: 21 pages, 15 figures. arXiv admin note: text overlap with arXiv:0709.2072 by other authors |
| Databáze: | arXiv |
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