论文标题
CEPC的集成光度测量的系统不确定性
Systematic uncertainties in integrated luminosity measurement at CEPC
论文作者
论文摘要
非常向前的区域是在未来的$ e^+e^ - collider上最具挑战性的区域之一。在CEPC，机器 - 探测器界面包括用于精确测量每磨级或更高的集成光度的热量表。在这里，我们回顾了这种精确度的可行性，从光度计学计算机的机械精度和定位，与光束相关的要求和物理背景产生的可行性。还讨论了光束能量扩散及其不确定性对集成光度精度的影响，以及可实现的束能量通过CEPC后CEPC梁扩散精度。
The very forward region is one of the most challenging regions to instrument at a future $e^+e^-$ collider. At CEPC, machine-detector interface includes, among others, a calorimeter dedicated for precision measurement of the integrated luminosity at a per mill level or better. Here we review a feasibility of such precision, from the point of view systematic effects arising from luminometer mechanical precision and positioning, beam-related requirements and physics background from two-photon processes. The impact of the beam energy spread and its uncertainty on the integrated luminosity precision is also discussed, as well as the achievable beam energy spread precision with the post-CDR CEPC beams.
