The QCD analysis of the CCFR data for $xF_3$: higher twists and $α_s(M_Z)$ extractions at the NNLO and beyond
| dc.creator | Kataev, A. L. | |
| dc.creator | Parente, G. | |
| dc.creator | Sidorov, A. V. | |
| dc.date | 1998-09-23 | |
| dc.date.accessioned | 2026-07-07T04:05:09Z | |
| dc.date.available | 2026-07-07T04:05:09Z | |
| dc.description | The improved next-to-next-to-leading order (NNLO) QCD analysis of the experimental data of the CCFR collaboration for the $xF_3$ structure function is made. Theoretical ambiguities of the NNLO fits are estimated by means of the Padé resummation technique, which was applied both in the expanded and non-expanded forms. The NNLO and the new N$^3$LO $α_s(Q^2)$ $\bar{MS}$-matching conditions are used. In the process of the fits we are taking into account the target mas corrections and the twist-4 $1/Q^2$-terms. Our NNLO results for $α_s(M_Z)$ values, extracted from the CCFR $xF_3$ data, are $α_s(M_Z)=0.118 \pm 0.002 (stat)\pm 0.005 (syst) \pm 0.003(theory)$ provided the twist-4 contributions are fixed through the infrared renormalon model and $α_s(M_Z)=0.116^{+ 0.006}_{-0.007}(stat)\pm 0.005 (syst) \pm 0.004(theory)$ provided the twist-4 terms are considered as the free parameters. It is shown that the extracted at the NNLO order $x$-shape of the twist-4 correction is almost unchanged after application of the Padé resummation approximant. | |
| dc.description | LaTeX, 21 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9809500 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9809500 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/48310 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | The QCD analysis of the CCFR data for $xF_3$: higher twists and $α_s(M_Z)$ extractions at the NNLO and beyond | |
| dc.type | text |