Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations

Abbiendi, G.; Ainsley, C.; Åkesson, P. F.; Alexander, G.; Anagnostou, G.; Anderson, K. J.; Asai, S.; Axen, D.; Bailey, I.; Barberio, E.; Barillari, T.; Barlow, R. J.; Batley, R. J.; Bechtle, P.; Behnke, T.; Bell, K. W.; Bell, P. J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Boeriu, O.; Bock, P.; Boutemeur, M.; Braibant, Sylvie; Brown, R. M.; Burckhart, H. J.; Campana, S.; Capiluppi, Paolo; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Ciocca, Claudia; Csilling, A.; Cuffiani, Marco; Dado, S.; Dallavalle, M.; Roeck, A.; Wolf, E. A.; Desch, K.; Dienes, B.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Etzion, E.; Fabbri, F.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Gagnon, P.; Gary, J. W.; Geich Gimbel, C.; Giacomelli, GIORGIO MARIA; Giacomelli, P.; Giunta, M.; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwé, M.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G. G.; Harel, A.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Herten, G.; Heuer, R. D.; Hill, J. C.; Horváth, D.; Igo Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T. R.; Kanzaki, J.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; Kluth, S.; Kobayashi, T.; Kobel, M.; Komamiya, S.; Krämer, T.; Krasznahorkay, A.; Krieger, P.; Krogh, J.; Kuhl, T.; Kupper, M.; Lafferty, G. D.; Landsman, H.; Lanske, D.; Lellouch, D.; Letts, J.; Levinson, L.; Lillich, J.; Lloyd, S. L.; Loebinger, F. K.; Lu, J.; Ludwig, A.; Ludwig, J.; Mader, W.; Marcellini, S.; Martin, A. J.; Mashimo, T.; Mättig, P.; Mckenna, J.; Mcpherson, R. A.; Meijers, F.; Menges, W.; Merritt, F. S.; Mes, H.; Meyer, N.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D. J.; Mohr, W.; Mori, T.; Mutter, A.; Nagai, K.; Nakamura, I.; Nanjo, H.; Neal, H. A.; O’Neale, S. W.; Oh, A.; Oreglia, M. J.; Orito, S.; Pahl, C.; Pásztor, G.; Pater, J. R.; Pilcher, J. E.; Pinfold, J.; Plane, D. E.; Pooth, O.; Przybycień, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Roney, J. M.; Rossi, A. M.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sarkisyan, E. K. G.; Schaile, A. D.; Schaile, O.; Scharff Hansen, P.; Schieck, J.; Schörner Sadenius, T.; Schröder, M.; Schumacher, M.; Seuster, R.; Shears, T. G.; Shen, B. C.; Sherwood, P.; Skuja, A.; Smith, A. M.; Sobie, R.; Söldner Rembold, S.; Spano, F.; Stahl, A.; Strom, D.; Ströhmer, R.; Tarem, S.; Tasevsky, M.; Teuscher, R.; Thomson, M. A.; Torrence, E.; Toya, D.; Trigger, I.; Trócsányi, Z.; Tsur, E.; Turner Watson, M. F.; Ueda, I.; Ujvári, B.; Vollmer, C. F.; Vannerem, P.; Vértesi, R.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Ward, C. P.; Ward, D. R.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Wells, P. S.; Wengler, T.; Wermes, N.; Wilson, G. W.; Wilson, J. A.; Wolf, G.; Wyatt, T. R.; Yamashita, S.; Zer Zion, D.; Zivkovic, L.

doi:10.1140/epjc/s10052-011-1733-z

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 αS. 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 while the combined NNLO + NLLA result is 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 αS agrees with the QCD prediction of asymptotic freedom and excludes the absence of running.

Determination of α S using OPAL hadronic event shapes at $\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}$ and resummed NNLO calculations / G. Abbiendi;C. Ainsley;P. F. Åkesson;G. Alexander;G. Anagnostou;K. J. Anderson;S. Asai;D. Axen;I. Bailey;E. Barberio;T. Barillari;R. J. Barlow;R. J. Batley;P. Bechtle;T. Behnke;K. W. Bell;P. J. Bell;G. Bella;A. Bellerive;G. Benelli;S. Bethke;O. Biebel;O. Boeriu;P. Bock;M. Boutemeur;S. Braibant;R. M. Brown;H. J. Burckhart;S. Campana;P. Capiluppi;R. K. Carnegie;A. A. Carter;J. R. Carter;C. Y. Chang;D. G. Charlton;C. Ciocca;A. Csilling;M. Cuffiani;S. Dado;M. Dallavalle;A. Roeck;E. A. Wolf;K. Desch;B. Dienes;J. Dubbert;E. Duchovni;G. Duckeck;I. P. Duerdoth;E. Etzion;F. Fabbri;P. Ferrari;F. Fiedler;I. Fleck;M. Ford;A. Frey;P. Gagnon;J. W. Gary;C. Geich-Gimbel;G. Giacomelli;P. Giacomelli;M. Giunta;J. Goldberg;E. Gross;J. Grunhaus;M. Gruwé;A. Gupta;C. Hajdu;M. Hamann;G. G. Hanson;A. Harel;M. Hauschild;C. M. Hawkes;R. Hawkings;G. Herten;R. D. Heuer;J. C. Hill;D. Horváth;P. Igo-Kemenes;K. Ishii;H. Jeremie;P. Jovanovic;T. R. Junk;J. Kanzaki;D. Karlen;K. Kawagoe;T. Kawamoto;R. K. Keeler;R. G. Kellogg;B. W. Kennedy;S. Kluth;T. Kobayashi;M. Kobel;S. Komamiya;T. Krämer;A. Krasznahorkay;P. Krieger;J. Krogh;T. Kuhl;M. Kupper;G. D. Lafferty;H. Landsman;D. Lanske;D. Lellouch;J. Letts;L. Levinson;J. Lillich;S. L. Lloyd;F. K. Loebinger;J. Lu;A. Ludwig;J. Ludwig;W. Mader;S. Marcellini;A. J. Martin;T. Mashimo;P. Mättig;J. McKenna;R. A. McPherson;F. Meijers;W. Menges;F. S. Merritt;H. Mes;N. Meyer;A. Michelini;S. Mihara;G. Mikenberg;D. J. Miller;W. Mohr;T. Mori;A. Mutter;K. Nagai;I. Nakamura;H. Nanjo;H. A. Neal;S. W. O’Neale;A. Oh;M. J. Oreglia;S. Orito;C. Pahl;G. Pásztor;J. R. Pater;J. E. Pilcher;J. Pinfold;D. E. Plane;O. Pooth;M. Przybycień;A. Quadt;K. Rabbertz;C. Rembser;P. Renkel;J. M. Roney;A. M. Rossi;Y. Rozen;K. Runge;K. Sachs;T. Saeki;E. K. G. Sarkisyan;A. D. Schaile;O. Schaile;P. Scharff-Hansen;J. Schieck;T. Schörner-Sadenius;M. Schröder;M. Schumacher;R. Seuster;T. G. Shears;B. C. Shen;P. Sherwood;A. Skuja;A. M. Smith;R. Sobie;S. Söldner-Rembold;F. Spano;A. Stahl;D. Strom;R. Ströhmer;S. Tarem;M. Tasevsky;R. Teuscher;M. A. Thomson;E. Torrence;D. Toya;I. Trigger;Z. Trócsányi;E. Tsur;M. F. Turner-Watson;I. Ueda;B. Ujvári;C. F. Vollmer;P. Vannerem;R. Vértesi;M. Verzocchi;H. Voss;J. Vossebeld;C. P. Ward;D. R. Ward;P. M. Watkins;A. T. Watson;N. K. Watson;P. S. Wells;T. Wengler;N. Wermes;G. W. Wilson;J. A. Wilson;G. Wolf;T. R. Wyatt;S. Yamashita;D. Zer-Zion;L. Zivkovic. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - ELETTRONICO. - 71:(2011), pp. 1-21. [10.1140/epjc/s10052-011-1733-z]