Abstract
The value of the strong coupling constant, {Mathematical expression}, is determined from a study of 15 different observables in hadronic Z0 and τ decays. The study includes global event shape variables, jet production rates, energy correlations, the Z0 line shape and decay asymmetries and the hadronic branching fraction of τ-leptons. Differences between the αs values from the different observables can be consistently attributed to unknown higher order contributions to the[Figure not available: see fulltext.] calculations. These uncertaities may be parametrized by variations of the renormalization scale and of the parton virtuality to which the data are corrected, separately for each observable, resulting in a consistent description of the event shapes, jet rates and energy correlations with the value {Mathematical expression} in[Figure not available: see fulltext.]. The error is dominated by the theoretical uncertainties. Application of recent calculations which include the resummation of leading and next-to-leading logarithms to all orders for some observables confirm this result with a reduced sensitivity to renormalization scale variations. The Z0 line shapes and τ-lepton branching ratios yield {Mathematical expression} and {Mathematical expression}, respectively, in[Figure not available: see fulltext.]. These measurements and their uncertainties are entirely independent of each other and from event shape and jet observables; the good agreement of the resulting αs values thus constitutes an important consistency check of the reliability of perturbative QCD.
| Original language | English |
|---|---|
| Pages (from-to) | 1-24 |
| Number of pages | 24 |
| Journal | Zeitschrift für Physik C Particles and Fields |
| Volume | 55 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1992 Mar |
| Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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In: Zeitschrift für Physik C Particles and Fields, Vol. 55, No. 1, 03.1992, p. 1-24.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - A global determination of {Mathematical expression} at LEP
AU - Acton, P. D.
AU - Alexander, G.
AU - Allison, J.
AU - Allport, P. P.
AU - Anderson, K. J.
AU - Arcelli, S.
AU - Ashton, P.
AU - Astbury, A.
AU - Axen, D.
AU - Azuelos, G.
AU - Bahan, G. A.
AU - Baines, J. T.M.
AU - Ball, A. H.
AU - Banks, J.
AU - Barker, G. J.
AU - Barlow, R. J.
AU - Batley, J. R.
AU - Beaudion, G.
AU - Beck, A.
AU - Becker, J.
AU - Behnke, T.
AU - Bell, K. W.
AU - Bella, G.
AU - Berlich, P.
AU - Bethke, S.
AU - Biebel, O.
AU - Binder, U.
AU - Bloodworth, I. J.
AU - Bock, P.
AU - Boden, B.
AU - Bosch, H. M.
AU - Bougerolle, S.
AU - Brabson, B. B.
AU - Breuker, H.
AU - Brown, R. M.
AU - Brun, R.
AU - Buijs, A.
AU - Burckhart, H. J.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlton, D. G.
AU - Clarke, P. E.L.
AU - Cohen, I.
AU - Collins, W. J.
AU - Conboy, J. E.
AU - Cooper, M.
AU - Couch, M.
AU - Coupland, M.
AU - Cuffiani, M.
AU - Dado, S.
AU - Dallavalle, G. M.
AU - De Jong, S.
AU - Debu, P.
AU - del Pozo, L. A.
AU - Deninno, M. M.
AU - Dieckmann, A.
AU - Dittmar, M.
AU - Dixit, M. S.
AU - do Couto e Silva, E.
AU - Duchovni, E.
AU - Duckeck, G.
AU - Duerdoth, I. P.
AU - Dumas, D. J.P.
AU - Elcombe, P. A.
AU - Estabrooks, P. G.
AU - Etzion, E.
AU - Evans, H. G.
AU - Fabbri, F.
AU - Fincke-Keeler, M.
AU - Fischer, H. M.
AU - Fong, D. G.
AU - Fukunaga, C.
AU - Gaidot, A.
AU - Ganel, O.
AU - Gary, J. W.
AU - Gascon, J.
AU - McGowan, R. F.
AU - Geddes, N. I.
AU - Geich-Gimbel, C.
AU - Gensler, S. W.
AU - Gentit, F. X.
AU - Giacomelli, G.
AU - Gibson, V.
AU - Gibson, W. R.
AU - Gillies, J. D.
AU - Goldberg, J.
AU - Goodrick, M. J.
AU - Gorn, W.
AU - Grandi, C.
AU - Grant, F. C.
AU - Hagemann, J.
AU - Hanson, G. G.
AU - Hansroul, M.
AU - Hargrove, C. K.
AU - Harrison, P. F.
AU - Hart, J.
AU - Hattersley, P. M.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Heflin, E.
AU - Hemingway, R. J.
AU - Heuer, R. D.
AU - Hill, J. C.
AU - Hillier, S. J.
AU - Hinshaw, D. A.
AU - Ho, C.
AU - Hobbs, J. D.
AU - Hobson, P. R.
AU - Hochman, D.
AU - Homer, R. J.
AU - Honma, A. K.
AU - Hou, S. R.
AU - Howarth, C. P.
AU - Hughes-Jones, R. E.
AU - Humbert, R.
AU - Igo-Kemenes, P.
AU - Ihssen, H.
AU - Imrie, D. C.
AU - Janissen, A. C.
AU - Jawahery, A.
AU - Jeffreys, P. W.
AU - Jeremie, H.
AU - Jimack, M.
AU - Jobes, M.
AU - Jones, R. W.L.
AU - Jovanovic, P.
AU - Karlen, D.
AU - Kawagoe, K.
AU - Kawamoto, T.
AU - Keeler, R. K.
AU - Kellogg, R. G.
AU - Kennedy, B. W.
AU - Klem, D. E.
AU - Kobayashi, T.
AU - Kokott, T. P.
AU - Komamiya, S.
AU - Köpke, L.
AU - Kral, J. F.
AU - Kowalewski, R.
AU - Kreutzmann, H.
AU - von Krogh, J.
AU - Kroll, J.
AU - Kuwano, M.
AU - Kyberd, P.
AU - Lafferty, G. D.
AU - Lamarche, F.
AU - Larson, W. J.
AU - Layter, J. G.
AU - Le Du, P.
AU - Leblanc, P.
AU - Lee, A. M.
AU - Lehto, M. H.
AU - Lellouch, D.
AU - Lennert, P.
AU - Leroy, C.
AU - Letts, J.
AU - Levegrün, S.
AU - Levinson, L.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Lorah, J. M.
AU - Lorazo, B.
AU - Losty, M. J.
AU - Lou, X. C.
AU - Ludwig, J.
AU - Mannelli, M.
AU - Marcellini, S.
AU - Maringer, G.
AU - Martin, A. J.
AU - Martin, J. P.
AU - Mashimo, T.
AU - Mättig, P.
AU - Maur, U.
AU - McKenna, J.
AU - McMahon, T. J.
AU - McNutt, J. R.
AU - Meijers, F.
AU - Menszner, D.
AU - Merritt, F. S.
AU - Mes, H.
AU - Michelini, A.
AU - Middleton, R. P.
AU - Mikenberg, G.
AU - Mildenberger, J.
AU - Miller, D. J.
AU - Mir, R.
AU - Mohr, W.
AU - Moisan, C.
AU - Montanari, A.
AU - Mori, T.
AU - Moss, M. W.
AU - Mouthuy, T.
AU - Nellen, B.
AU - Nguyen, H. H.
AU - O'Neale, S. W.
AU - O'Neill, B. P.
AU - Oakham, F. G.
AU - Odorici, F.
AU - Ogg, M.
AU - Ogren, H. O.
AU - Oh, H.
AU - Oram, C. J.
AU - Oreglia, M. J.
AU - Orito, S.
AU - Pansart, J. P.
AU - Panzer-Steindel, B.
AU - Paschievici, P.
AU - Patrick, G. N.
AU - Pawley, S. J.
AU - Pfister, P.
AU - Pilcher, J. E.
AU - Pitman, D.
AU - Plane, D. E.
AU - Poffenberger, P.
AU - Poli, B.
AU - Pouladdej, A.
AU - Prebys, E.
AU - Pritchard, T. W.
AU - Przysiezniak, H.
AU - Quast, G.
AU - Redmond, M. W.
AU - Rees, D. L.
AU - Riles, K.
AU - Robins, S. A.
AU - Robinson, D.
AU - Rollnik, A.
AU - Roney, J. M.
AU - Ros, E.
AU - Rossberg, S.
AU - Rossi, A. M.
AU - Rosvick, M.
AU - Routenberg, P.
AU - Runge, K.
AU - Runolfsson, O.
AU - Rust, D. R.
AU - Sanghera, S.
AU - Sasaki, M.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Schappert, W.
AU - Scharff-Hansen, P.
AU - Schenk, P.
AU - von der Schmitt, H.
AU - Schreiber, S.
AU - Schwiening, J.
AU - Scott, W. G.
AU - Settles, M.
AU - Shen, B. C.
AU - Sherwood, P.
AU - Shypit, R.
AU - Simon, A.
AU - Singh, P.
AU - Siroli, G. P.
AU - Skuja, A.
AU - Smith, A. M.
AU - Smith, T. J.
AU - Snow, G. A.
AU - Sobie, R.
AU - Springer, R. W.
AU - Sproston, M.
AU - Stephens, K.
AU - Ströhmer, R.
AU - Strom, D.
AU - Takeda, H.
AU - Takeshita, T.
AU - Taras, P.
AU - Tarem, S.
AU - Teixeira-Dias, P.
AU - Thackray, N. J.
AU - Transtromer, G.
AU - Tsukamoto, T.
AU - Turner, M. F.
AU - Tysarczyk-Niemeyer, G.
AU - Van den plas, D.
AU - Van Kooten, R.
AU - VanDalen, G. J.
AU - Vasseur, G.
AU - Virtue, C. J.
AU - Wagner, A.
AU - Wagner, D. L.
AU - Wahl, C.
AU - Walker, J. P.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Weber, M.
AU - Weber, P.
AU - Weisz, S.
AU - Wells, P. S.
AU - Wermes, N.
AU - Whalley, M. A.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Wingerter, I.
AU - Winterer, V. H.
AU - Wlodek, T.
AU - Wood, N. C.
AU - Wotton, S.
AU - Wyatt, T. R.
AU - Yaari, R.
AU - Yang, Y.
AU - Yekutieli, G.
AU - Yurko, M.
AU - Zeuner, W.
AU - Zorn, G. T.
PY - 1992/3
Y1 - 1992/3
N2 - The value of the strong coupling constant, {Mathematical expression}, is determined from a study of 15 different observables in hadronic Z0 and τ decays. The study includes global event shape variables, jet production rates, energy correlations, the Z0 line shape and decay asymmetries and the hadronic branching fraction of τ-leptons. Differences between the αs values from the different observables can be consistently attributed to unknown higher order contributions to the[Figure not available: see fulltext.] calculations. These uncertaities may be parametrized by variations of the renormalization scale and of the parton virtuality to which the data are corrected, separately for each observable, resulting in a consistent description of the event shapes, jet rates and energy correlations with the value {Mathematical expression} in[Figure not available: see fulltext.]. The error is dominated by the theoretical uncertainties. Application of recent calculations which include the resummation of leading and next-to-leading logarithms to all orders for some observables confirm this result with a reduced sensitivity to renormalization scale variations. The Z0 line shapes and τ-lepton branching ratios yield {Mathematical expression} and {Mathematical expression}, respectively, in[Figure not available: see fulltext.]. These measurements and their uncertainties are entirely independent of each other and from event shape and jet observables; the good agreement of the resulting αs values thus constitutes an important consistency check of the reliability of perturbative QCD.
AB - The value of the strong coupling constant, {Mathematical expression}, is determined from a study of 15 different observables in hadronic Z0 and τ decays. The study includes global event shape variables, jet production rates, energy correlations, the Z0 line shape and decay asymmetries and the hadronic branching fraction of τ-leptons. Differences between the αs values from the different observables can be consistently attributed to unknown higher order contributions to the[Figure not available: see fulltext.] calculations. These uncertaities may be parametrized by variations of the renormalization scale and of the parton virtuality to which the data are corrected, separately for each observable, resulting in a consistent description of the event shapes, jet rates and energy correlations with the value {Mathematical expression} in[Figure not available: see fulltext.]. The error is dominated by the theoretical uncertainties. Application of recent calculations which include the resummation of leading and next-to-leading logarithms to all orders for some observables confirm this result with a reduced sensitivity to renormalization scale variations. The Z0 line shapes and τ-lepton branching ratios yield {Mathematical expression} and {Mathematical expression}, respectively, in[Figure not available: see fulltext.]. These measurements and their uncertainties are entirely independent of each other and from event shape and jet observables; the good agreement of the resulting αs values thus constitutes an important consistency check of the reliability of perturbative QCD.
UR - http://www.scopus.com/inward/record.url?scp=0000063948&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000063948&partnerID=8YFLogxK
U2 - 10.1007/BF01558285
DO - 10.1007/BF01558285
M3 - Article
AN - SCOPUS:0000063948
SN - 0170-9739
VL - 55
SP - 1
EP - 24
JO - Zeitschrift für Physik C Particles and Fields
JF - Zeitschrift für Physik C Particles and Fields
IS - 1
ER -