Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-11-21
Eur.Phys.J.C16:579-596,2000
Physics
High Energy Physics
High Energy Physics - Experiment
35 pages, 11 Figures, submitted to Eur. Phys. J. C
Scientific paper
10.1007/s100520000420
The inclusive production of D*+- mesons in photon-photon collisions has been measured using the OPAL detector at LEP at e+e- centre-of-mass energies of 183 and 189GeV. The D* mesons are reconstructed in their decay to D0pi+ with the D0 observed in the two decay modes Kpi+ and Kpi+pi-pi+. After background subtraction, 100.4+-12.6(stat) D*+- mesons have been selected in events without observed scattered beam electron ("anti-tagged") and 29.8+-5.9 (stat) D*+- mesons in events where one beam electron is scattered into the detector ("single-tagged"). Direct and single-resolved events are studied separately. Differential cross-sections as functions of the D* transverse momentum p_t and pseudorapidity \eta are presented in the kinematic region 2
Abbiendi Giovanni
collaboration The OPAL
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