The reliability of pQCD approach in pion electromagnetic form factor
| dc.creator | Wei, Zheng-Tao | |
| dc.creator | Yang, Mao-Zhi | |
| dc.date | 2002-07-08 | |
| dc.date | 2002-07-17 | |
| dc.date.accessioned | 2026-07-07T03:47:25Z | |
| dc.date.available | 2026-07-07T03:47:25Z | |
| dc.description | The pion electromagnetic form factor with leading and next-to-leading twist corrections are studied in the framework of pQCD approach. We find that, at small momentum transfer regions, Sudakov effects cannot provide a strong enough suppression of the non-perturbative contributions coming from large transverse separations, but at large momentum transfer region, non-perturbative contributions can be effectively suppressed. So pQCD approach can be applied at large momentum transfer region. At the energy region where experiment can access so far, i.e. Q < 4GeV, pQCD prediction can not be precise because there may be a quite large part of contributions coming from non-perturbative region. The calculation of power corrections may not be performed systematically in pQCD framework. | |
| dc.description | 12 pages, 5 figures, the preprint of hep-ph/0207127 is canceled and this work is under collaboration of us | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0207106 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0207106 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/41658 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The reliability of pQCD approach in pion electromagnetic form factor | |
| dc.type | text |