标题： 费米实验室和大型强子对撞机中的衍射和总截面 显示英文标题

标题： Diffraction and Total Cross-Section at the Tevatron and the LHC

摘要： 在Tevatron，CDF在546 GeV和1.8 TeV下测量了总 p_bar-p 截面，而E710/E811则在1.8 TeV下进行了测量。1.8 TeV下的两个结果之间存在2.6个标准偏差的差异，这给向更高能量的外推带来了很大的不确定性。在LHC，TOTEM合作组正准备通过测量总 p-p 截面来解决这一歧义，其精度约为1%。与Tevatron实验类似，将使用基于光学定理的亮度无关方法。Tevatron实验还进行了广泛的软和硬衍射事件研究，部分通过罗马桶探测器进行反质子标记，部分通过快速度空隙标记。在LHC，结合CMS/TOTEM实验将在相互作用点两侧使用前所未有的快速度覆盖范围和罗马桶光谱仪来开展其衍射计划。物理菜单包括对软衍射微分截面、衍射结构函数、快速度空隙生存率以及通过双泊格交换的中心专属生产进行详细研究。 显示英文摘要

摘要： At the Tevatron, the total p_bar-p cross-section has been measured by CDF at 546 GeV and 1.8 TeV, and by E710/E811 at 1.8 TeV. The two results at 1.8 TeV disagree by 2.6 standard deviations, introducing big uncertainties into extrapolations to higher energies. At the LHC, the TOTEM collaboration is preparing to resolve the ambiguity by measuring the total p-p cross-section with a precision of about 1 %. Like at the Tevatron experiments, the luminosity-independent method based on the Optical Theorem will be used. The Tevatron experiments have also performed a vast range of studies about soft and hard diffractive events, partly with antiproton tagging by Roman Pots, partly with rapidity gap tagging. At the LHC, the combined CMS/TOTEM experiments will carry out their diffractive programme with an unprecedented rapidity coverage and Roman Pot spectrometers on both sides of the interaction point. The physics menu comprises detailed studies of soft diffractive differential cross-sections, diffractive structure functions, rapidity gap survival and exclusive central production by Double Pomeron Exchange.