Renormalization-group improved evolution of the meson distribution amplitude at the two-loop level
| dc.creator | Bakulev, Alexander P. | |
| dc.creator | Stefanis, N. G. | |
| dc.date | 2005-03-04 | |
| dc.date | 2005-06-28 | |
| dc.date.accessioned | 2026-07-07T11:04:44Z | |
| dc.date.available | 2026-07-07T11:04:44Z | |
| dc.description | We discuss the two-loop evolution of the flavor-nonsinglet meson distribution amplitude in perturbative QCD. After reviewing previous two-loop computations, we outline the incompatibility of these solutions with the group property of the renormalization-group transformations. To cure this deficiency, we compute a correction factor for the non-diagonal part of the meson evolution equation and prove that with this modification the two-loop solution conforms with the group properties of the renormalization-group transformations. The special case of a fixed strong coupling (no Q^2 dependence) is also discussed and comparison is given to previously obtained results. | |
| dc.description | 23 pages, 9 figures, Revtex4 class. Discussion of relation to conformal symmetry enlarged and references added. Matches version to be published in Nucl. Phys. B | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0503045 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0503045 | |
| dc.identifier | Nucl.Phys.B721:50-78,2005 | |
| dc.identifier | doi:10.1016/j.nuclphysb.2005.05.026 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/188990 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Renormalization-group improved evolution of the meson distribution amplitude at the two-loop level | |
| dc.type | text |