标题： 在L3实验的γ-γ碰撞中的包含π0和K0s 显示英文标题

标题： Inclusive pi0 and K0s in gamma-gamma at L3

摘要： 在LEP上使用L3探测器收集的数据研究了ee → ee+π0+X和ee → ee+K0s+X反应，数据的能量范围为sqrt{s}= 189-202 GeV。 在伪快度的中心值处，即|η| < 0.5 或 |η| < 1.5，展示了横动量范围0.2 GeV < pt < 7.5 GeV内的微分截面dsigma/dpt，并给出了不同pt值下的微分截面dsigma/d|η|。 对于pt ≤ 1 GeV，数据的pt依赖性可以用指数拟合很好地描述。对于pt > 1 GeV，截面与NLO QCD计算以及LO蒙特卡洛预测进行了比较。 显示英文摘要

摘要： The ee -> ee+pi0+X and ee -> ee+K0s+X reactions are studied at LEP using data collected with the L3 detector at sqrt{s}=189-202 GeV. Preliminary results for the differential cross section dsigma/dpt in the transverse momentum range 0.2 GeV < pt < 7.5 GeV at central values of pseudo-rapidity, |eta| < 0.5 or |eta| < 1.5, and the differential cross section dsigma/d|eta| for different values of pt are presented. For pt le 1 GeV, the pt -dependence of the data are well described by an exponential fit. For pt > 1 GeV the cross sections are compared to NLO QCD calculations and to LO Monte Carlo predictions.