Combined analysis of SLAC-BCDMS-NMC data at high x: α_s and high twists
| dc.creator | Sergey, Alekhin | |
| dc.date | 1999-07-14 | |
| dc.date.accessioned | 2026-07-07T04:07:37Z | |
| dc.date.available | 2026-07-07T04:07:37Z | |
| dc.description | We perform a NLO QCD analysis of the nonsinglet part of the combined SLAC-BCDMS-NMC data on inclusive deep inelastic cross section with the extraction of $α_s$. We show that the value of $α_s$ obtained in the analysis is sensitive to the statistical inference procedures dealing with systematic errors on the data. The fit with the complete account of point-to-point correlations of the data gives the value of $α_s(M_Z)=0.1183\pm0.0021(exp.)\pm0.0013(ren.scale)$ that is compatible with the LEP measurements and the world average. Model independent x-shape of high twist contributions to the structure functions $F_L$ and $F_2$ is extracted. Twist-4 contribution to $F_L$ is found to be in qualitative agreement with the predictions of infrared renormalon model. Twist-6 contribution to $F_L$ exhibit weak trend to negative values, and twist-6 contribution to $F_2$ - to positive values, although both are compatible with zero within errors. | |
| dc.description | 4 pages, LATEX, 4 figures (EPS). Talk given at XXXIV Moriond conference - "QCD and high energy hadronic interactions", March 20-27, 1999, Les Arcs | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9907350 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9907350 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/49212 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Combined analysis of SLAC-BCDMS-NMC data at high x: α_s and high twists | |
| dc.type | text |