Abstract
Data from e+e- annihilation into hadrons at centre-of-mass energies between 91 GeV and 209 GeV collected with the OPAL detector at LEP, are used to study the four-jet rate as a function of the Durham algorithm resolution parameter ycut. The four-jet rate is compared to next-to-leading order calculations that include the resummation of large logarithms. The strong coupling measured from the four-jet rate is \(\alpha_{\text{S}(M_{\text{Z}^0})}=0.1182\pm0.0003(\text{stat.})\pm0.0015(\text{exp.}) \pm0.0011(\text{had.})\pm0.0012(\text{scale})\pm0.0013(\text{mass}),\) in agreement with the world average. Next-to-leading order fits to the D-parameter and thrust minor event-shape observables are also performed for the first time. We find consistent results, but with significantly larger theoretical uncertainties.
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References
S. Catani et al., Phys. Lett. B 263, 491 (1991)
S. Catani et al., Phys. Lett. B 269, 432 (1991)
L. Dixon, A. Signer, Phys. Rev. D 56, 4031 (1997)
Z. Nagy, Z. Trócsányi, Nucl. Phys. B (Proc. Suppl.) 74, 48 (1999)
G. Parisi, Phys. Lett. B 74, 65 (1978); J.F. Donoghue, F.E. Low, S.Y. Pi, Phys. Rev. 20, 2759 (1979); R.K. Ellis, D.A. Ross, A.E. Terrano, Nucl. Phys. B 178, 421 (1981)
S. Brandt et al., Phys. Lett. 12, 57 (1964); D. Fahri et al., Phys. Rev. Lett. 39, 1587 (1977)
Z. Nagy, Z. Trócsányi, Phys. Rev. Lett. 79, 3604 (1997)
J.M. Campbell et al., Eur. Phys. J. C 9, 245 (1999)
OPAL Collaboration, G. Abbiendi et al., Eur. Phys. J. C 20, 601 (2001)
DELPHI Collaboration, J. Abdallah et al., Eur. Phys. J. C 38, 413 (2005)
ALEPH Collaboration, A. Heister et al., Eur. Phys. J. C 27, 1 (2003)
OPAL Collaboration, G. Abbiendi et al., CERN-EP-2005-024, submitted to to Eur. Phys. J. C
OPAL Collaboration, G. Abbiendi et al., Eur. Phys. J. C 40, 287 (2005)
Y. Dokshitzer et al., JHEP 9708, 001 (1997)
Z. Nagy, Z. Trócsányi, Phys. Rev. D 59, 14020 (1999); Erratum, ibid. 62 (2000) 099902
OPAL Collaboration, K. Ahmet et al., Nucl. Instrum. Methods 305, 275 (1991), S. Anderson et al., Nucl. Instrum. Methods A 403, 326 (1998)
T. Sjöstrand, Comp. Phys. Commun. 39, 347 (1986); T. Sjöstrand, M. Bengtsson, Comp. Phys. Commun. 43, 367 (1987)
S. Jadach et al., Phys. Lett. B 449, 97 (1999); S. Jadach et al., Comp. Phys. Commun. 130, 260 (2000)
T. Sjöstrand, Comp. Phys. Commun. 82, 74 (1994)
G. Marchesini et al., Comp. Phys. Commun. 67, 465 (1992)
S. Jadach et al., Comp. Phys. Commun. 119, 272 (1999)
J. Fujimoto et al., Comp. Phys. Commun. 100, 128 (1997)
J. Allison et al., Nucl. Instrum. Methods A 317, 47 (1992)
L. Lönnblad, Comp. Phys. Commun. 71, 15 (1992)
OPAL Collaboration, G. Alexander et al., Z. Phys. C 69, 543 (1996)
OPAL Collaboration, G. Abbiendi et al., Eur. Phys. J. C 35, 293 (2004)
OPAL Collaboration, G. Abbiendi et al., Eur. Phys. J. C 33, 173 (2004)
OPAL Collaboration, G. Abbiendi et al., Eur. Phys. J. C 8, 191 (1999); OPAL Collaboration, G. Abbiendi et al., Phys. Lett. B 493, 249 (2000)
K.G. Hayes, M. Perl, B. Efron, Phys. Rev. D 39, 274 (1989)
R.W.L. Jones et al., JHEP 12, 007 (2003)
S. Schael et al., A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-PH-EP/2004-069
A. Ballestrero et al., in: Reports of the Working Group on Precision Calculations for LEP2 physics (CERN, Geneva, 2000), eds. S. Jadach et al., CERN-2000-09, p. 95 [hep-ph/0006259v2]
J. Chyla, A.L. Kataev, in: Reports of the Working Group on Precision Calculations for the Z Resonance (CERN, Geneva, 1994), eds. D.Y. Bardin et al., CERN-95-03, p. 313 [hep-ph/9502383]
OPAL Collaboration, P.D. Acton et al., Z. Phys. C 55, 1 (1992)
P.M. Stevenson, Phys. Rev. D 23, 2916 (1981)
DELPHI Collaboration, P. Abreu et al., Eur. Phys. J. C 14, 557 (2000)
S. Bethke, Nucl. Phys. Proc. Suppl. 135, 345 (2004)
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Abbiendi, G., Ainsley, C., Åkesson, P. et al. Measurement of the strong coupling αS from four-jet observables in e+e- annihilation. Eur. Phys. J. C 47, 295–307 (2006). https://doi.org/10.1140/epjc/s2006-02581-y
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DOI: https://doi.org/10.1140/epjc/s2006-02581-y