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Measurement of the inclusive D$^*\pm$ production in $\gamma\gamma$ collisions at LEP2

The inclusive production of D$^{*\pm}$ mesons in two-photon collisions is measured with the ALEPH detector at center-of-mass energies from 183$\unit{GeV}$-209$\unit{GeV}$. Contributions from direct and single resolved processes are separated using event shape variables. Differential cross sections o...

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Detalles Bibliográficos
Autor principal: CERN. Geneva. ALEPH
Lenguaje:eng
Publicado: 2002
Materias:
XX
Acceso en línea:http://cds.cern.ch/record/644883
Descripción
Sumario:The inclusive production of D$^{*\pm}$ mesons in two-photon collisions is measured with the ALEPH detector at center-of-mass energies from 183$\unit{GeV}$-209$\unit{GeV}$. Contributions from direct and single resolved processes are separated using event shape variables. Differential cross sections of D$^{*\pm}$ production as function of the transverse momentum $p_{\rm t}$ and of the pseudorapidity $\eta$ of the D$^{*\pm}$ meson are measured in the range $ 2\unit{GeV}/c < p_{\rm t}(D^{*\pm}) < 12\unit{GeV}/c $ and $|\eta(D^{*\pm})| < 1.5 $ and are compared to next-to-leading order (NLO) perturbative QCD calculations. The extrapolation of the integrated visible D$^{*\pm}$ cross section to the total charm cross section is performed.