| Title: | MEASUREMENT OF Z/γ* PRODUCTION IN COMPTON SCATTERING OF QUASI-REAL PHOTONS |
| DOI No: | 10.1142/9789812777157_0016 |
| Source: | PHOTON 2001 (pp 80-83)
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| Author(s): | I. FLECK
Universität Freiburg, Fakultät für Physik, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
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| Abstract: | The process e+e- → e+e-Z/γ* is studied with the OPAL detector at LEP at a centre of mass energy of  . The cross-section times the branching ratio of the Z/γ* decaying into hadrons is measured within Lorentz invariant kinematic limits to be (1.2±0.3±0.1) pb for invariant masses of the hadronic system between 5 GeV and 60 GeV and (0.7±0.2±0.1) pb for hadronic masses above 60 GeV. The differential cross-sections of the Mandelstam variables  ,  , and  are measured and compared with the predictions from the Monte Carlo generators grc4f and PYTHIA. From this, based on a factorisation ansatz, the total and differential cross-sections for the subprocess eγ → eZ/γ* are derived. |
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