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arXiv 0712.0604hep-ex
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费米实验室Tevatron p-pbar对撞机上双喷流的观测

Observation of Exclusive Dijet Production at the Fermilab Tevatron p-pbar Collider

CDF Collaboration, T. Aaltonen

摘要:

我们首次观测到pbar-p相互作用中双电子注的产生,并测量了它的截面:pbar + p --> pbar + dijet + p。利用费米实验室运行II对撞机探测器在sqrt{s}=1.96 TeV时收集的310 pb-1的数据样本,测量了具有两个横向能量ET >= 10 GeV的喷流的事件的排他性截面,作为最小ET(喷流)的函数。基于预期的双射流信号和背景形状的蒙特卡罗模拟,从对数据分布的拟合中提取排他性信号。模拟的背景分布形状检查在一个很大程度上独立的数据样本的200 PB-1的b-标记的射流事件的研究中,预计独家dijet生产被抑制的Jz=0的总角动量选择规则。得到的结果与理论预期进行了比较,并讨论了在pp大型强子对撞机在sqrt{s}=14 TeV的独家希格斯玻色子玻色子生产的影响。

英文摘要:

We present the first observation and cross section measurement of exclusive dijet production in pbar-p interactions, pbar + p --> pbar + dijet + p. Using a data sample of 310 pb-1 collected by the Run II Collider Detector at Fermilab at sqrt{s}=1.96 TeV, exclusive cross sections for events with two jets of transverse energy ET >= 10 GeV have been measured as a function of minimum ET(jet). The exclusive signal is extracted from fits to data distributions based on Monte Carlo simulations of expected dijet signal and background shapes. The simulated background distribution shapes are checked in a study of a largely independent data sample of 200 pb-1 of b-tagged jet events, where exclusive dijet production is expected to be suppressed by the Jz=0 total angular momentum selection rule. Results obtained are compared with theoretical expectations, and implications for exclusive Higgs boson production at the pp Large Hadron Collider at sqrt{s}=14 TeV are discussed.

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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