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Analyzing new neutral gauge bosons at the LHC using third generation fermions.

机译:使用第三代费米子分析大型强子对撞机的新中性规子玻色子。

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摘要

This thesis reports on techniques and the corresponding phenomenology for distinguishing between models in the analysis of new neutral gauge boson production at the LHC. Specifically, third generation final states are reviewed and determined to be effective channels for analysis. Transverse momentum cuts of pTf > 0.3MZ' to hadronic final states are employed to reduce QCD backgrounds and distinguish t and b signals. An analysis of the ratio of the t and b cross sections to the mu cross section, within an invariant mass window of 0.965MZ' ≤ Mf f ≤ 1.035MZ', is performed. For final state fermion detection efficiencies of epsilonmu = 0.96, epsilont = 0.10, and epsilon b = 0.50, most models considered can be distinguished by at least one standard deviation for MZ' = 1500 GeV, with 10 fb-1 integrated luminosity. Furthermore, the ratio of the tau to mu cross sections is analyzed and used to understand models with preferential couplings to third generation particles in the lepton family. Assuming an efficiency of epsilontau = 0.2, generation universality can be determined up to approximately a 5% uncertainty for a 1000 GeV Z' with 10 fb-1 integrated luminosity.
机译:这篇论文报道了在大型强子对撞机分析中性规玻色子的过程中用于区分模型的技术和相应的现象学。具体来说,第三代最终状态将被审查并确定为有效的分析渠道。将横向动量削减pTf> 0.3MZ'至强子性最终状态用于减少QCD背景并区分t和b信号。在不变质量窗口0.965MZ'≤Mf f≤1.035MZ'内,分析t和b横截面与mu横截面之比。对于epsilonmu = 0.96,epsilont = 0.10和epsilon b = 0.50的最终状态费米子检测效率,大多数模型可以通过MZ'= 1500 GeV的至少一个标准偏差和10 fb-1的综合发光度来区分。此外,还分析了tau与mu横截面的比率,并用于了解与轻子家族中的第三代粒子优先耦合的模型。假设epsilontau的效率= 0.2,则对于具有10 fb-1集成光度的1000 GeV Z',可以确定高达5%的不确定性。

著录项

  • 作者

    Martin, Travis A. W.;

  • 作者单位

    Carleton University (Canada).;

  • 授予单位 Carleton University (Canada).;
  • 学科 Physics Elementary Particles and High Energy.
  • 学位 M.Sc.
  • 年度 2007
  • 页码 107 p.
  • 总页数 107
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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