Bukin, D.A
E+ E- --> 2HADRON X
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QCD coherence studies using two particle azimuthal correlations

The OPAL collaboration Acton, P.D. ; Alexander, G. ; Allison, John ; et al.
Z.Phys.C 58 (1993) 207-218, 1993.
Inspire Record 343082 DOI 10.17182/hepdata.14494

From a sample of 146900 hadronicZ0 decays recorded by the OPAL detector at LEP, we have studied the azimuthal correlations of particles in hadronic events. It is expected that these correlations are sensitive to interference effects in QCD. We have compared the data to QCD Monte Carlo models which include and which do not include interference effects. We find that the distributions of azimuthal correlations are not reproduced by the parton shower models we have tested unless interference effects are included, no matter which hadronisation scheme is used.

2 data tables
Table 1

Corrected data for the EMMC.

Table 2

Corrected data for the TPAC.