naa a22 4500 510768008 CHVBK 20180411083203.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1007/s12043-013-0615-3 doi (NATIONALLICENCE)springer-10.1007/s12043-013-0615-3 Next-to-next-to-leading order calculation of the strong coupling constant α s by using moments of event-shape variables [Elektronische Daten] [SAMIRA MOHSENABADI, MOHAMMAD ZOMORRODIAN] The next-to-next-to-leading order (NN'LO) quantum chromodynamics (QCD) correction to the first three moments of the four event-shape variables in electron-positron annihilation, the thrust, heavy jet mass, wide, and total jet broadening, is computed. It is observed that the NNLO correction gives a better agreement between the theory and the experimental data. Also, by using the above observables, the strong coupling constant (α s) is determined and how much its value is affected by the NNLO correction is demonstrated. By combining the results for all variables at different centre-of-mass energies $\alpha_{\rm s} ({M_{Z^0}})=0.1248\pm 0.0009\left( {\exp\!.} \right)_{-0.0144}^{+0.0283} \left({\mbox{theo}.} \right)$ is obtained. Indian Academy of Sciences, 2013 Event shape nationallicence quantum chromodynamics nationallicence next-to-next-to-leading order correction nationallicence MOHSENABADI SAMIRA Department of Physics, Ferdowsi University of Mashhad, 91775-1436, Mashhad, Iran aut ZOMORRODIAN MOHAMMAD Department of Physics, Ferdowsi University of Mashhad, 91775-1436, Mashhad, Iran aut Pramana Springer India 81/5(2013-11-01), 791-798 0304-4289 81:5<791 2013 81 12043 https://doi.org/10.1007/s12043-013-0615-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12043-013-0615-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- MOHSENABADI SAMIRA Department of Physics, Ferdowsi University of Mashhad, 91775-1436, Mashhad, Iran aut NATIONALLICENCE 700 1- ZOMORRODIAN MOHAMMAD Department of Physics, Ferdowsi University of Mashhad, 91775-1436, Mashhad, Iran aut NATIONALLICENCE 773 0- Pramana Springer India 81/5(2013-11-01), 791-798 0304-4289 81:5<791 2013 81 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer