Journal article
Inclusive production of D*± mesons in photon-photon collisions at √see = 183 and 189 GeV and a first measurement of Fγ2,c
G Abbiendi, K Ackerstaff, PF Akesson, G Alexander, J Allison, KJ Anderson, S Arcelli, S Asai, SF Ashby, D Axen, G Azuelos, I Bailey, AH Ball, E Barberio, T Barillari, RJ Barlow, JR Batley, S Baumann, T Behnke, KW Bell Show all
European Physical Journal C | SPRINGER | Published : 2000
Abstract
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 √see of 183 and 189 GeV. The D*+ mesons are reconstructed in their decay to D0π+ with the D0 observed in the two decay modes K-π+ and K-π+π-π+. 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 dσ/dpD*T and dσ/d|ηD*| as functions of the D*± transverse m..
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