arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1610.04074hep-ph
收藏

利用不对称观测量发现和分辨LHC轻子加喷注末态顶对产生中的Z'信号

Using asymmetry observables to discover and distinguish Z' signals in top pair production with the lepton-plus-jets final state at the LHC

Lucio Cerrito, Declan Millar, Stefano Moretti, Francesco Spanò

摘要:

我们研究了在LHC上6费米子衰变产生的顶对潜在Z'玻色子的存在和性质的敏感性,解释了完整的树级标准模型ttbar干涉,所有中间粒子都允许离壳。我们专注于轻子加喷流的最终状态,并模拟实验条件,包括运动学要求和顶夸克对重建的存在下,失踪的横向能量和组合的模糊性,在喷流顶分配。我们专注于微分质谱的截面和不对称的观测,特别是演示使用后者在探测一个新的中性共振的耦合结构,除了的情况下,不对称形成一个互补的发现观察。

英文摘要:

We study the sensitivity of top pair production with six-fermion decay at the LHC to the presence and nature of an underlying Z' boson, accounting for full tree-level Standard Model ttbar interference, with all intermediate particles allowed off-shell. We concentrate on the lepton-plus-jets final state and simulate experimental conditions, including kinematic requirements and top quark pair reconstruction in the presence of missing transverse energy and combinatorial ambiguity in jet-top assignment. We focus on the differential mass spectra of the cross section and asymmetry observables, especially demonstrating the use of the latter in probing the coupling structure of a new neutral resonance, in addition to cases in which the asymmetry forms a complementary discovery observable.

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。

↑