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Measurement of the charm structure function F_{2,c)^{γ} of the photon at LEP

Abbiendi, G; Ainsley, C; Åkesson, PF; Alexander, G; Allison, J; Amaral, P; Anagnostou, G; ... Hoffman, K; + view all (2002) Measurement of the charm structure function F_{2,c)^{γ} of the photon at LEP. Physics Letters B , 539 (1-2) pp. 13-24. 10.1016/S0370-2693(02)01999-8. Green open access

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Abstract

The production of charm quarks is studied in deep-inelastic electron–photon scattering using data recorded by the OPAL detector at LEP at nominal e⁺e⁻ centre-of-mass energies from 183 to 209 GeV. The charm quarks have been identified by full reconstruction of charged D* mesons using their decays into D⁰π with the D⁰ observed in two decay modes with charged particle final states, Kπ and Kπππ. The cross-section σ^{D*} for production of charged D* in the reaction e⁺e⁻→e⁺e⁻D*Χ is measured in a restricted kinematical region using two bins in Bjorken x, 0.0014<x<0.1 and 0.1<x<0.87. From σ^{D*} the charm production cross-section σ(e⁺e⁻→e⁺e⁻ccΧ) and the charm structure function of the photon F_{2,c}^{γ} are determined in the region 0.0014<x<0.87 and 5<Q²<100GeV². For x>0.1 the perturbative QCD calculation at next-to-leading order agrees perfectly with the measured cross-section. For x<0.1 the measured cross-section is 43.8±14.3±6.3±2.8 pb with a next-to-leading order prediction of 17.0⁺²·⁹_₂.₃ pb.

Type: Article
Title: Measurement of the charm structure function F_{2,c)^{γ} of the photon at LEP
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/S0370-2693(02)01999-8
Publisher version: https://doi.org/10.1016/S0370-2693(02)01999-8
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/9839
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