标题： COMPASS-II极化μ子束流的GPD物理研究 显示英文标题

标题： GPD Physics With Polarized Muon Beams at COMPASS-II

摘要： COMPASS 计划的很大一部分致力于通过深度虚康普顿散射（DVCS）和深度虚介子产生（DVMP）研究核子结构。COMPASS 将使用 160 GeV 的高强度μ束流，并结合一个由新的飞行时间探测系统包围的 2.5 米长的液态氢靶来测量 DVCS 和 DVMP 反应。 高能且具有相反电荷和极化的μ束流的可用性将使我们能够访问与主要广义部分子分布（GPD）相关的康普顿形式因子$H$，并研究纯 DVCS 截面的$t$斜率的$x_{B}$依赖性，以及研究核子断层扫描。将展示关于可达到的精度的预测以及初步试点测量的结果。 显示英文摘要

摘要： A major part of the future COMPASS program is dedicated to the investigation of the nucleon structure through Deeply Virtual Compton Scattering (DVCS) and Deeply Virtual Meson Production (DVMP). COMPASS will measure DVCS and DVMP reactions with a high intensity muon beam of 160 GeV and a 2.5 m-long liquid hydrogen target surrounded by a new TOF system. The availability of muon beams with high energy and opposite charge and polarization will allow to access the Compton form factor related to the dominant GPD $H$ and to study the $x_{B}$-dependence of the $t$-slope of the pure DVCS cross section and to study nucleon tomography. Projections on the achievable accuracies and preliminary results of pilot measurements will be presented.