Using 109 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z resonance peak, the strong coupling constant alpha(s) (M(Z)2) is determined from an analysis of the global event shape variables thrust, heavy jet mass and the differential two-jet rate based on the k(T)-clustering scheme. The analysis uses improved theoretical predictions in which leading and next-to-leading logarithms, resummed to all orders, supplement second order expressions. After combining the results from all variables, alpha(s) (M(Z)2) is measured to be 0. 12 5 +/- 0.005, where the error is the quadratic sum of experimental and theoretical uncertainties, and is dominated by the latter.

Decamp, D., Deschizeaux, B., Goy, C., Lees, J., Minard, M., Alemany, R., et al. (1992). Measurement of αs in hadronic Z decays using all-orders resummed predictions. PHYSICS LETTERS. SECTION B, 284(1-2), 163-176 [10.1016/0370-2693(92)91942-3].

Measurement of αs in hadronic Z decays using all-orders resummed predictions

CARPINELLI, Massimo;
1992

Abstract

Using 109 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z resonance peak, the strong coupling constant alpha(s) (M(Z)2) is determined from an analysis of the global event shape variables thrust, heavy jet mass and the differential two-jet rate based on the k(T)-clustering scheme. The analysis uses improved theoretical predictions in which leading and next-to-leading logarithms, resummed to all orders, supplement second order expressions. After combining the results from all variables, alpha(s) (M(Z)2) is measured to be 0. 12 5 +/- 0.005, where the error is the quadratic sum of experimental and theoretical uncertainties, and is dominated by the latter.
Articolo in rivista - Articolo scientifico
JET PRODUCTION-RATES; PARTON SHOWERS; MONTE-CARLO; QCD; MULTIPLICITY; RESONANCE; COHERENT; FRAGMENTATION;
English
163
176
14
Decamp, D., Deschizeaux, B., Goy, C., Lees, J., Minard, M., Alemany, R., et al. (1992). Measurement of αs in hadronic Z decays using all-orders resummed predictions. PHYSICS LETTERS. SECTION B, 284(1-2), 163-176 [10.1016/0370-2693(92)91942-3].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390436
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