HERA深度虚 Compton 散射测量

使用ZEUS探测器在HERA处于e+p和e-p碰撞中分别集成了95.0 pb-1和16.7 pb-1的积分光照，测量了深度虚 Compton 散射反应ep -> e gamma p的横截面。 presented as a function of the exchanged-photon virtuality, Q2, and the centre-of-mass energy, W, of the gamma*p system in the region 5 < Q2 < 100 GeV2 and 40 < W < 140 GeV. The measured cross sections rise steeply with increasing W. The measurements are compared to QCD-based calculations. 深度虚 Compton 散射的横截面随交换光子虚度Q2和gamma*p系统中心质能W的函数形式被测量，范围为5 < Q2 < 100 GeV2和40 < W < 140 GeV。测得的横截面随W增大而显著增长。与QCD计算进行比较。