标题： 粒子在强子对撞机中的产生：快速度间隙——希格斯粒子的情况 显示英文标题

标题： Particle Production in a Hadron Collider Rapidity Gap: The Higgs Case

摘要： 在快速度间隙内产生稀有粒子已被提议作为在强子对撞机上探测新物理的无背景信号。 尚无完整的形式化方法能够解释此类过程。 我们研究了一个简单的最低阶QCD模型来描述这些过程。 集中于希格斯粒子的产生，我们表明pp -> pp H的截面计算可以嵌入到成功解释弥散数据的现有模型中。 我们将这些模型扩展以考虑单个和双弥散截面pp -> H X1 X2，其中碎片X1和X2之间存在一个间隙。 使用保守的场景，我们评估了计算中的不确定性，并研究了截面与间隙宽度的依赖关系。 我们预测， 在四单位快速度间隙内，质子-质子碰撞产生希格斯粒子的截面约为0.3 pb，当希格斯粒子质量为100 GeV时，在Tevatron上；而在LHC上，当束流能量为14 TeV且希格斯粒子质量为400 GeV时，在六单位快速度间隙内的截面几乎达到2 pb。 显示英文摘要

摘要： Production of rare particles within rapidity gaps has been proposed as a background-free signal for the detection of new physics at hadron colliders. No complete formalism accounts for such processes yet. We study a simple lowest-order QCD model for their description. Concentrating on Higgs production, we show that the calculation of the cross section pp -> pp H can be embedded into existing models which successfully account for diffractive data. We extend those models to take into account single and double diffractive cross sections pp -> H X1 X2 with a gap between the fragments X1 and X2. Using conservative scenarios, we evaluate the uncertainties in our calculation, and study the dependence of the cross section on the gap width. We predict that Higgs production within a gap of 4 units of rapidity is about 0.3 pb for a 100 GeV Higgs at the Tevatron, and almost 2 pb for a 400 GeV Higgs within a gap of 6 units at the LHC with 14 TeV beams.