NNLO evolution of deep-inelastic structure functions: the non-singlet case
| dc.creator | van Neerven, W. L. | |
| dc.creator | Vogt, A. | |
| dc.date | 1999-07-23 | |
| dc.date.accessioned | 2026-07-07T11:47:53Z | |
| dc.date.available | 2026-07-07T11:47:53Z | |
| dc.description | We study the next-to-next-to-leading order (NNLO) evolution of flavour non-singlet quark densities and structure functions in massless perturbative QCD. Present information on the corresponding three-loop splitting functions is used to derive parametrizations of these quantities, including Bjorken-x dependent estimates of their residual uncertainties. Compact expressions are also provided for the exactly known, but rather involved two-loop coefficient functions. The size of the NNLO corrections and their effect on the stability under variations of the renormalization scale are investigated. The residual uncertainty of the three-loop splitting functions does not lead to appreciable effects for x > 10^-2. Inclusion of the NNLO contributions reduces the main theoretical uncertainty of alpha_s determinations from non-singlet scaling violations by more than a factor of two. | |
| dc.description | 29 pages, LaTeX, 13 eps-figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9907472 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9907472 | |
| dc.identifier | Nucl.Phys.B568:263-286,2000 | |
| dc.identifier | doi:10.1016/S0550-3213(99)00668-9 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/202733 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | NNLO evolution of deep-inelastic structure functions: the non-singlet case | |
| dc.type | text |