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Determination of alpha(S) using jet rates at LEP with the OPAL detector

Abbiendi, G. and Ainsley, C. and Akesson, P. F. and Alexander, G. and Anagnostou, G. and Anderson, K. J. and Asai, S. and Axen, D. and Bailey, I. and Barberio, E. and Barillari, T. and Barlow, R. J. and Batley, R. J. and Bechtle, P. and Behnke, T. and Bell, K. W. and Bell, P. J. and Bella, G. and Bellerive, A. and Benelli, G. and Bethke, S. and Biebel, O. and Boeriu, O. and Bock, P. and Boutemeur, M. and Braibant, S. and Brown, R. M. and Burckhart, H. J. and Campana, S. and Capiluppi, P. and Carnegie, R. K. and Carter, A. A. and Carter, J. R. and Chang, C. Y. and Charlton, D. G. and Ciocca, C. and Csilling, A. and Cuffiani, M. and Dado, S. and De Roeck, A. and De Wolf, E. A. and Desch, K. and Dienes, B. and Donkers, M. and Dubbert, J. and Duchovni, E. and Duckeck, G. and Duerdoth, T. P. and Etzion, E. and Fabbri, F. and Ferrari, P. and Fiedler, F. and Fleck, I. and Ford, M. and Frey, A. and Gagnon, P. and Gary, J. W. and Geich-Gimbel, C. and Giacomelli, G. and Giacomelli, P. and Giunta, M. and Goldberg, J. and Gross, E. and Grunhaus, J. and Gruwe, M. and Guenther, P. O. and Gupta, A. and Hajdu, C. and Hamann, M. and Hanson, C. G. and Harel, A. and Hauschild, M. and Hawkes, C. M. and Hawkings, R. and Hemingway, R. J. and Herten, G. and Heuer, R. D. and Hill, J. C. and Horvath, D. and Igo-Kemenes, P. and Ishii, K. and Jeremie, H. and Jovanovic, P. and Junk, T. R. and Kanzaki, J. and Karlen, D. and Kawagoe, K. and Kawamoto, T. and Keeler, R. K. and Kellogg, R. G. and Kennedy, B. W. and Kluth, S. and Kobayashi, T. and Kobel, M. and Komamiya, S. and Kraemer, T. and Krasznahorkay, A. and Krieger, P. and von Krogh, J. and Kuhl, T. and Kupper, M. and Lafferty, G. D. and Landsman, H. and Lanske, D. and Lellouch, D. and Letts, J. and Levinson, L. and Lillich, J. and Lloyd, S. L. and Loebinger, F. K. and Lu, J. and Ludwig, A. and Ludwig, J. and Mader, W. and Marcellini, S. and Martin, A. J. and Mashimo, T. and Maettig, P. and McKenna, J. and McPherson, R. A. and Meijers, F. and Menges, W. and Merritt, F. S. and Mes, H. and Meyer, N. and Michelini, A. and Mihara, S. and Mikenberg, G. and Miller, D. J. and Mohr, W. and Mori, T. and Mutter, A. and Nagai, K. and Nakamura, I. and Nanjo, H. and Neal, H. A. and Nisius, R. and O'Neale, S. W. and Oh, A. and Oreglia, M. J. and Orito, S. and Pahl, C. and Pasztor, G. and Pater, J. R. and Pilcher, J. E. and Pinfold, J. and Plane, D. E. and Pooth, O. and Przybycien, M. and Quadt, A. and Rabbertz, K. and Rembser, C. and Renkel, P. and Roney, J. M. and Rossi, A. M. and Rozen, Y. and Runge, K. and Sachs, K. and Saeki, T. and Sarkisyan, E. K. G. and Schaile, A. D. and Schaile, O. and Scharff-Hansen, P. and Schieck, J. and Schoerner-Sadenius, T. and Schroeder, M. and Schumacher, M. and Seuster, R. and Shears, T. G. and Shen, B. C. and Sherwood, P. and Skuja, A. and Smith, A. M. and Sobie, R. and Soldner-Rembold, S. and Spano, F. and Stahl, A. and Strom, D. and Stroehmer, R. and Tarem, S. and Tasevsky, M. and Teuscher, R. and Thomson, M. A. and Torrence, E. and Toya, D. and Tran, P. and Trigger, I. and Trocsanyi, Z. and Tsur, E. and Turner-Watson, M. F. and Ueda, I. and Ujvarie, B. and Vollmer, C. F. and Vannerem, P. and Vertesie, R. and Verzocchi, M. and Voss, H. and Vossebeld, J. and Ward, C. P. and Ward, D. R. and Watkins, P. M. and Watson, A. T. and Watson, N. K. and Wells, P. S. and Wengler, T. and Wermes, N. and Wilson, G. W. and Wilson, J. A. and Wolf, G. and Wyatt, T. R. and Yamashita, S. and Zer-Zion, D. and Zivkovic, L. and , OPAL Collaboration (2006) Determination of alpha(S) using jet rates at LEP with the OPAL detector. European Physical Journal C: Particles and Fields, 45 (3). pp. 547-568. ISSN 1434-6044

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Abstract

Hadronic events produced in e(+)e(-) collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected between 1995 and 2000 and correspond to energies of 91 GeV, 130-136 GeV and 161-209 GeV. The jet rates were determined using four different jet-finding algorithms (Cone, JADE, Durham and Cambridge). The differential two-jet rate and the average jet rate with the Durham and Cambridge algorithms were used to measure alpha(S) in the LEP energy range by fitting an expression in which O(alpha(2)(S)) calculations were matched to a NLLA prediction and fitted to the data. Combining the measurements at different centre-of-mass energies, the value of alpha(s)(Mz) was determined to be as(Mz) = 0.1177 +/- 0.0006 (stat.) +/- 0.0012 (expt.) +/- 0.0010 (had.) +/- 0.0032 (theo.)

Item Type: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 59453
Deposited By: ep_importer_pure
Deposited On: 04 Nov 2012 15:12
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:16
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59453

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