标题： LEP对撞机中双光子碰撞中全态$D^{*\pm}$产生的测量 显示英文标题

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

摘要： 在LEP上，L3实验测量了双光子碰撞中$\mathrm{D^{*\pm}}$介子的包容性产生。 数据是在质心系能量$\sqrt{s} = 189$GeV下收集的，积分亮度为$176.4 \mathrm{pb^{-1}}$。 过程$\mathrm{e^+e^- \to D^{*\pm} X}$的微分截面在动量转移范围1 GeV$< p_{T}^{\mathrm{D^*}} < 5 $GeV和$\mathrm{|\eta^{D^*}|} < 1.4$的运动学区域内，作为$\mathrm{D^{*\pm}}$介子的横向动量和伪快度的函数被确定。 该相空间区域的截面测量值为$132 \pm 22(stat.) \pm 26(syst.)$pb。 微分截面与下一阶微扰QCD计算进行了比较。 显示英文摘要

摘要： Inclusive production of $\mathrm{D^{*\pm}}$ 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 $176.4 \mathrm{pb^{-1}}$. Differential cross sections of the process $\mathrm{e^+e^- \to D^{*\pm} X}$ are determined as functions of the transverse momentum and pseudorapidity of the $\mathrm{D^{*\pm}}$ mesons in the kinematic region 1 GeV $< p_{T}^{\mathrm{D^*}} < 5 $ GeV and $\mathrm{|\eta^{D^*}|} < 1.4$. 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.