Measurement of the inclusive D*+- production in gamma-gamma collisions at LEP
| dc.creator | ALEPH Collaboration | |
| dc.creator | Heister, Arno | |
| dc.date | 2003-01-24 | |
| dc.date | 2003-01-27 | |
| dc.date.accessioned | 2026-07-07T12:25:53Z | |
| dc.date.available | 2026-07-07T12:25:53Z | |
| dc.description | The inclusive production of D$^{*\pm}$ mesons in two-photon collisions is measured with the ALEPH detector at $\epem$ centre-of-mass energies from 183$\unit{GeV}$ to 209$\unit{GeV}$. A total of $360 \pm 27$ D$^{*\pm}$ meson events were observed from an integrated luminosity of 699\unit{pb^{-1}}$. Contributions from direct and single-resolved rocesses are separated using the ratio of the transverse momentum $p_{\rm t}^{\rm D^{*\pm}}$ of the D$^{*\pm}$ to the visible invariant mass $W_{\mathrm{vis}}$ of the event. Differential cross sections of D$^{*\pm}$ production as functions of $p_{\rm t}^{\rm D^{*\pm}}$ and the pseudorapidity $|η^{\rm D^{*\pm}}| $ are measured in the range $ 2\unit{GeV}/c < p_{\rm t}^{\rm D^{*\pm}} < 12\unit{GeV}/c $ and $ |η^{\rm D^{*\pm}}| < 1.5 $. They are compared to next-to-leading order (NLO)perturbative QCD calculations. The extrapolation of the integrated visible D$^{*\pm}$ cross section to the total charm cross section, based on the Pythia Monte Carlo program, yields $ σ(\epem \to \epem \ccbar)_ {=197\unit{GeV}} = 731 \pm 74_{\mathrm{stat}} \pm 47_{\mathrm{syst}} \pm 157_{\mathrm{extr}} \unit{pb} $. | |
| dc.description | 10/01/2003<br> To be published in Eur. Phys. J. C | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0301034 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0301034 | |
| dc.identifier | Eur.Phys.J.C28:437-449,2003 | |
| dc.identifier | doi:10.1140/epjc/s2003-01201-x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/214711 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the inclusive D*+- production in gamma-gamma collisions at LEP | |
| dc.type | text |