Next-to-next-to-leading order QCD analysis of the revised CCFR data for xF_3 structure function and the higher twist contributions

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dc.creatorKataev, A. L.
dc.creatorKotikov, A. V.
dc.creatorParente, G.
dc.creatorSidorov, A. V.
dc.date1997-06-28
dc.date.accessioned2026-07-07T10:58:28Z
dc.date.available2026-07-07T10:58:28Z
dc.descriptionWe present the results of the next-to-next-to-leading order QCD analysis of the recently revised experimental data of the CCFR collaboration for the $xF_3$ structure function using the Jacobi polynomial expansion method. The effects of the higher twist contributions are included into the fits following the infrared renormalon motivated model. The special attention is paid to the checks of the predictive abilities of the infrared renormalon model and to the independent extraction of the $x$-shape of the twist-4 contributions to the $xF_3$ structure function in the process of the leading order, next-to-leading order and next-to-next-to-leading order fits of the revised CCFR data. We stress that at the next-to-next-to-leading order the results for $α_s(M_Z)$ turn out to be almost nonsensitive to the higher-twist terms. We obtain the following result $α_s(M_Z)^{NNLO}=0.117 \pm 0.002(stat) \pm 0.005 (syst)\pm 0.003 (theory)$. The comparison of the outcomes of our next-to-leading order and next-to-next-to-leading order analysis indicate that the theoretical QCD uncertainties were underestimated in the process of the next-to-leading order determination of $α_s(M_Z)$, made recently by the CCFR collaboration itself.
dc.descriptionLateX file, 12 pages, 3 ps figures; Presented in part at QCD Session of Recontres des Moriond-97 (March, 1997); submitted for publication
dc.identifierhttps://arxiv.org/abs/hep-ph/9706534
dc.identifierhttp://arxiv.org/abs/hep-ph/9706534
dc.identifierPhys.Lett.B417:374-384,1998
dc.identifierdoi:10.1016/S0370-2693(97)01239-2
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187110
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleNext-to-next-to-leading order QCD analysis of the revised CCFR data for xF_3 structure function and the higher twist contributions
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