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001-es BibID:	BIBFORM022708
035-os BibID:	(WoS)000295527700007 (Scopus)82655167546 (cikkazonosító)1733
Első szerző:	The OPAL Collaboration
Cím:	Determination of [alpha]_S using OPAL hadronic event shapes at root{s}=91-209 GeV and resummed NNLO calculations / The OPAL Collaboration
Dátum:	2011
Megjegyzések:	Hadronic event shape distributions from e+e- annihilation measured by the OPAL experiment at centre-of-mass energies between 91 GeV and 209 GeV are used to determine the strong coupling {\alpha}S. The results are based on QCD predictions complete to the next-to- next-to-leading order (NNLO), and on NNLO calculations matched to the resummed next-to-leading-log-approximation terms (NNLO+NLLA). The combined NNLO result from all variables and centre-of-mass energies is {\alpha}S(mZ0) = 0.1201 {\pm} 0.0008(stat.) {\pm} 0.0013(exp.) {\pm} 0.0010(had.) {\pm} 0.0024(theo.). while the combined NNLO+NLLA result is {\alpha}S(mZ0) = 0.1189 {\pm} 0.0008(stat.) {\pm} 0.0016(exp.) {\pm} 0.0010(had.) {\pm} 0.0036(theo.). The completeness of the NNLO and NNLO+NLLA results with respect to missing higher order contributions, studied by varying the renormalization scale, is improved compared to previous results based on NLO or NLO+NLLA predictions only. The observed energy dependence of {\alpha}S agrees with the QCD prediction of asymptotic freedom and excludes the absence of running.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	The European Physical Journal C. Particles and fields. - 71 : 9 (2011), p. 1-35. -
További szerzők:	Trócsányi Zoltán (1961-) (fizikus) Pálinkás József (1952-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat Szerző által megadott URL DOI
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