Abstract

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 [Equation not available: see fulltext.] while the combined NNLO + NLLA result is [Equation not available: see fulltext.] 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.

Details

Title
Determination of α S using OPAL hadronic event shapes at \(\sqrt{s} = 91\mbox{--}209~\mathrm{GeV}\) and resummed NNLO calculations
Author
Abbiendi, G 1 ; Ainsley, C 2 ; Åkesson, P F 3 ; Alexander, G 4 ; Anagnostou, G 5 ; Anderson, K J 6 ; Asai, S 7 ; Axen, D 8 ; Bailey, I 9 ; Barberio, E 3 ; Barillari, T 10 ; Barlow, R J 11 ; Batley, R J 2 ; Bechtle, P 12 ; Behnke, T 12 ; Bell, K W 13 ; Bell, P J 5 ; Bella, G 4 ; Bellerive, A 14 ; Benelli, G 15 ; Bethke, S 10 ; Biebel, O 16 ; Boeriu, O 17 ; Bock, P 18 ; Boutemeur, M 16 ; Braibant, S 1 ; Brown, R M 13 ; Burckhart, H J 3 ; Campana, S 15 ; Capiluppi, P 1 ; Carnegie, R K 14 ; Carter, A A 19 ; Carter, J R 2 ; Chang, C Y 20 ; Charlton, D G 5 ; Ciocca, C 1 ; Csilling, A 21 ; Cuffiani, M 1 ; Dado, S 22 ; Dallavalle, M 1 ; De Roeck, A 3 ; De Wolf, E A 3 ; Desch, K 12 ; Dienes, B 23 ; Dubbert, J 16 ; Duchovni, E 24 ; Duckeck, G 16 ; Duerdoth, I P 11 ; Etzion, E 4 ; Fabbri, F 1 ; Ferrari, P 3 ; Fiedler, F 16 ; Fleck, I 17 ; Ford, M 11 ; Frey, A 3 ; Gagnon, P 25 ; Gary, J W 15 ; Geich-Gimbel, C 26 ; Giacomelli, G 1 ; Giacomelli, P 1 ; Giunta, M 15 ; Goldberg, J 22 ; Gross, E 24 ; Grunhaus, J 4 ; Gruwé, M 3 ; Gupta, A 6 ; Hajdu, C 21 ; Hamann, M 12 ; Hanson, G G 15 ; Harel, A 22 ; Hauschild, M 3 ; Hawkes, C M 5 ; Hawkings, R 3 ; Herten, G 17 ; Heuer, R D 3 ; Hill, J C 2 ; Horváth, D 21 ; Igo-Kemenes, P 18 ; Ishii, K 7 ; Jeremie, H 27 ; Jovanovic, P 5 ; Junk, T R 14 ; Kanzaki, J 7 ; Karlen, D 9 ; Kawagoe, K 7 ; Kawamoto, T 7 ; Keeler, R K 9 ; Kellogg, R G 20 ; Kennedy, B W 13 ; Kluth, S 10 ; Kobayashi, T 7 ; Kobel, M 26 ; Komamiya, S 7 ; Krämer, T 12 ; Krasznahorkay, A, Jr 23 ; Krieger, P 14 ; J von Krogh 18 ; Kuhl, T 12 ; Kupper, M 24 ; Lafferty, G D 11 ; Landsman, H 22 ; Lanske, D 28 ; Lellouch, D 24 ; Letts, J; Levinson, L 24 ; Lillich, J 17 ; Lloyd, S L 19 ; Loebinger, F K 11 ; J Lu 8 ; Ludwig, A 26 ; Ludwig, J 17 ; Mader, W 26 ; Marcellini, S 1 ; Martin, A J 19 ; Mashimo, T 7 ; Mättig, P; McKenna, J 8 ; McPherson, R A 9 ; Meijers, F 3 ; Menges, W 12 ; Merritt, F S 6 ; Mes, H 14 ; Meyer, N 12 ; Michelini, A 1 ; Mihara, S 7 ; Mikenberg, G 24 ; Miller, D J 29 ; Mohr, W 17 ; Mori, T 7 ; Mutter, A 17 ; Nagai, K 19 ; Nakamura, I 7 ; Nanjo, H 7 ; Neal, H A 30 ; S W O’Neale 5 ; A Oh 3 ; Oreglia, M J 6 ; Orito, S 7 ; Pahl, C 10 ; Pásztor, G 15 ; Pater, J R 11 ; Pilcher, J E 6 ; Pinfold, J 31 ; Plane, D E 3 ; Pooth, O 28 ; Przybycień, M 3 ; Quadt, A 10 ; Rabbertz, K 3 ; Rembser, C 3 ; Renkel, P 24 ; Roney, J M 9 ; Rossi, A M 1 ; Rozen, Y 22 ; Runge, K 17 ; Sachs, K 14 ; Saeki, T 7 ; Sarkisyan, E K G 3 ; Schaile, A D 16 ; Schaile, O 16 ; Scharff-Hansen, P 3 ; Schieck, J 10 ; Schörner-Sadenius, T 3 ; Schröder, M 3 ; Schumacher, M 26 ; Seuster, R 28 ; Shears, T G 3 ; Shen, B C 15 ; Sherwood, P 29 ; Skuja, A 20 ; Smith, A M 3 ; Sobie, R 9 ; Söldner-Rembold, S 11 ; Spano, F 6 ; Stahl, A 28 ; Strom, D 32 ; Ströhmer, R 16 ; Tarem, S 22 ; Tasevsky, M 3 ; Teuscher, R 6 ; Thomson, M A 2 ; Torrence, E 32 ; Toya, D 7 ; Trigger, I 3 ; Trócsányi, Z 23 ; Tsur, E 4 ; Turner-Watson, M F 5 ; Ueda, I 7 ; Ujvári, B 23 ; Vollmer, C F 16 ; Vannerem, P 17 ; Vértesi, R 23 ; Verzocchi, M 20 ; Voss, H 3 ; Vossebeld, J 3 ; Ward, C P 2 ; Ward, D R 2 ; Watkins, P M 5 ; Watson, A T 5 ; Watson, N K 5 ; Wells, P S 3 ; Wengler, T 3 ; Wermes, N 26 ; Wilson, G W 11 ; Wilson, J A 5 ; Wolf, G 24 ; Wyatt, T R 11 ; Yamashita, S 7 ; Zer-Zion, D 15 ; Zivkovic, L 22 

1  Dipartimento di Fisica dell’ Università di Bologna and INFN, Bologna, Italy 
2  Cavendish Laboratory, Cambridge, UK 
3  CERN, European Organisation for Nuclear Research, Geneva 23, Switzerland 
4  Department of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel 
5  School of Physics and Astronomy, University of Birmingham, Birmingham, UK 
6  Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, IL, USA 
7  International Centre for Elementary Particle Physics and Department of Physics, University of Tokyo, Tokyo, Japan; Kobe University, Kobe, Japan 
8  Department of Physics, University of British Columbia, Vancouver, BC, Canada 
9  , University of Victoria, Victoria, Canada 
10  Max-Planck-Institute für Physik, München, Germany 
11  School of Physics and Astronomy, Schuster Laboratory, The University of Manchester, Manchester, UK 
12  Institut für Experimentalphysik, Universität Hamburg/DESY, Hamburg, Germany 
13  Rutherford Appleton Laboratory, Oxfordshire, UK 
14  Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, Ottawa, Ontario, Canada 
15  Department of Physics, University of California, Riverside, CA, USA 
16  Ludwig-Maximilians-Universität München, Garching, Germany 
17  Fakultät für Physik, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany 
18  Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany 
19  Queen Mary and Westfield College, University of London, London, UK 
20  Department of Physics, University of Maryland, College Park, MD, USA 
21  Research Institute for Particle and Nuclear Physics, Budapest, Hungary 
22  Department of Physics, Technion-Israel Institute of Technology, Haifa, Israel 
23  Institute of Nuclear Research, Debrecen, Hungary 
24  Particle Physics Department, Weizmann Institute of Science, Rehovot, Israel 
25  Department of Physics, Indiana University, Bloomington, IN, USA 
26  Physikalisches Institut, Universität Bonn, Bonn, Germany 
27  Laboratoire de Physique Nucléaire, Université de Montréal, Montréal, Québec, Canada 
28  Technische Hochschule Aachen, III Physikalisches Institut, Aachen, Germany 
29  University College London, London, UK 
30  Department of Physics, Yale University, New Haven, CT, USA 
31  Department of Physics, University of Alberta, Edmonton, AB, Canada 
32  Department of Physics, University of Oregon, Eugene, OR, USA 
Pages
1-21
Publication year
2011
Publication date
Sep 2011
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-011-1733-z
ProQuest document ID
2294042883
Copyright
The European Physical Journal C is a copyright of Springer, (2011). All Rights Reserved., © 2011. This work is published under https://creativecommons.org/licenses/by-nc/2.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.