Measurement of Inclusive $D^{\ast \pm }$ Production in Two-Photon Collisions at LEP

Abstract

Inclusive production of ${\mathrm{D}}^{\ast \pm }$ mesons in two-photon collisions was measured by the L3 experiment at LEP. The data were collected at a centre-of-mass energy $\sqrt{s}=189$ GeV with an integrated luminosity of $176.4\mathrm{p}{\mathrm{b}}^{-1}$. Differential cross sections of the process ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\mathrm{D}}^{\ast \pm }\mathrm{X}$ are determined as functions of the transverse momentum and pseudorapidity of the ${\mathrm{D}}^{\ast \pm }$ mesons in the kinematic region 1 GeV $<p_T^{{\mathrm{D}}^{\ast }}<5$ GeV and $|{\eta }^{{\mathrm{D}}^{\ast }}|<1.4$. The cross section integrated over this phase space domain is measured to be $132\pm 22(stat.)\pm 26(syst.)$ pb. The differential cross sections are compared with next-to-leading order perturbative QCD calculations.

Cited by in corpus (5)

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