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AbstractAbstract
[en] The inclusive production of D*± mesons in two-photon collisions is measured with the ALEPH detector at e+e- centre-of-mass energies from 183 GeV to 209 GeV. A total of 360 ±27D*± meson events are observed from an integrated luminosity of 699 pb-1. Contributions from direct and single-resolved processes are separated using the ratio of the transverse momentum ptD*± of the D*± to the visible invariant mass Wvis of the event. Differential cross sections of D*± production as functions of ptD*± and the pseudorapidity vertical stroke ηD*± vertical stroke are measured in the range 2 GeV/c< ptD*±<12 GeV/c and vertical stroke ηD*± vertical stroke <1.5. They are compared to next-to-leading order (NLO) perturbative QCD calculations. The extrapolation of the integrated visible D*± cross section to the total charm cross section, based on the Pythia Monte Carlo program, yields σ(e+e-→e+e- c anti c) leftangle√(s)rightangle=197GeV=731±74stat±47syst±157extr pb. (orig.)
Primary Subject
Source
Available from: http://dx.doi.org/10.1140/epjc/s2003-01201-x
Record Type
Journal Article
Literature Type
Numerical Data
Journal
European Physical Journal. C; ISSN 1434-6044;
; v. 28(4); p. 437-449

Country of publication
C QUARKS, D*-2010 MESONS, DIFFERENTIAL CROSS SECTIONS, ELECTRON-POSITRON INTERACTIONS, ELECTRONS, ELECTROPRODUCTION, EXPERIMENTAL DATA, GEV RANGE 100-1000, INCLUSIVE INTERACTIONS, INTEGRAL CROSS SECTIONS, PAIR PRODUCTION, PARTICLE RAPIDITY, PHOTON-PHOTON INTERACTIONS, PHOTOPRODUCTION, POSITRONS, TRANSVERSE MOMENTUM
ANTILEPTONS, ANTIMATTER, ANTIPARTICLES, BASIC INTERACTIONS, BOSONS, CHARM PARTICLES, CHARMED MESONS, CROSS SECTIONS, DATA, ELECTROMAGNETIC INTERACTIONS, ELEMENTARY PARTICLES, ENERGY RANGE, FERMIONS, GEV RANGE, HADRONS, INFORMATION, INTERACTIONS, LEPTON-LEPTON INTERACTIONS, LEPTONS, LINEAR MOMENTUM, MATTER, MESONS, NUMERICAL DATA, PARTICLE INTERACTIONS, PARTICLE PRODUCTION, PARTICLE PROPERTIES, QUARKS, VECTOR MESONS
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