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arXiv 0810.5357hep-ex
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sqrt(s)=1.96 TeV的p-pbar碰撞产生的多μ子事例研究

Study of multi-muon events produced in p-pbar collisions at sqrt(s)=1.96 TeV

CDF Collaboration

摘要:

我们报告的研究,多μ子事件产生的费米实验室Tevatron对撞机和记录的CDDII探测器。在一个用专用的双μ子触发器获得的数据集中,对应于2100 pb^-1的积分亮度,我们分离出了一个重要的事件样本,其中至少有一个μ子候选者是在半径为1.5 cm的束管之外产生的。生产截面和运动学的事件,其中两个μ子候选者产生的束管内成功地建模由已知的QCD过程,其中包括重口味的生产。相比之下,我们目前无法完全解释剩余事件的数量和属性,其中至少有一个μ子候选者在束管之外产生,就CDDII探测器,触发器和事件重建的相同理解而言。本文给出了这些事件的几个拓扑和运动学性质。这些事件为长期存在的与b-bbar产生和衰变有关的不一致性提供了一个合理的解决方案。

英文摘要:

We report a study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDFII detector. In a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 2100 pb^-1, we isolate a significant sample of events in which at least one of the muon candidates is produced outside of the beam pipe of radius 1.5cm. The production cross section and kinematics of events in which both muon candidates are produced inside the beam pipe are successfully modeled by known QCD processes which include heavy flavor production. In contrast, we are presently unable to fully account for the number and properties of the remaining events, in which at least one muon candidate is produced outside of the beam pipe, in terms of the same understanding of the CDFII detector, trigger, and event reconstruction. Several topological and kinematic properties of these events are presented in this paper. These events offer a plausible resolution to long-standing inconsistencies related to b-bbar production and decay.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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