Abstract
We present high statistics measurements of the energy-energy correlation (EEC) and its related asymmetry (AEEC) ine + e − annihilation at a c.m. energy of 34.6 GeV. We find that the energy dependence as well as the large angle behaviour of the latter are well described by perturbative QCD calculations toOα( 2 s ). Non-perturbative effects are estimated with the help of fragmentation models in which different jet topologies are separated using (ɛ, δ) cuts, and found to be small. The extracted values of\(\Lambda _{\overline {MS} }\) lie between 100 and 300 MeV.
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Deceased
Supported by the BMFT, FRG
Partially supported by The Norwegian Council for Science and the Humanities
Rome University, partially supported by I.N.F.N., Sezione di Roma, Italy
Supported by the U.K. Science and Engineering Research Council
Partially supported by the Department of Energy, USA
Partially supported by the Israeli Academy of Sciences and Humanities-Basic Research Foundation
Supported by a Research Grant from the Ministery of Science and Research of Northrhine-Westphalia
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PLUTO Collaboration., Berger, C., Genzel, H. et al. A study of energy-energy correlations ine + e − annihilations at\(\sqrt s = 34.6\) GeV. Z. Phys. C - Particles and Fields 28, 365–370 (1985). https://doi.org/10.1007/BF01413599
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DOI: https://doi.org/10.1007/BF01413599