The effect of real and virtual photons in the di-lepton channel at the LHC
The effect of real and virtual photons in the di-lepton channel at the LHC
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DOI：
10.1016/j.physletb.2017.04.025
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发表时间：
2016-12
影响因子：
4.4
通讯作者：
E. Accomando;J. Fiaschi;F. Hautmann;S. Moretti;C. Shepherd-Themistocleous
中科院分区：
文献类型：
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作者：
E. Accomando;J. Fiaschi;F. Hautmann;S. Moretti;C. Shepherd-Themistocleous
我们提出了一项关于欧洲核子研究中心大型强子对撞机双轻子产生的研究，特别关注初始状态下真实和虚拟光子产生的贡献。我们讨论了相空间区域，其中轻子对的不变质量为几个 TeV 量级，目前正在其中寻找产生双轻子特征的新物理现象。我们研究了光子诱导双轻子产生中所有可能拓扑的产量和相关不确定性，并将其与标准 Drell-Yan 通道中的预期进行比较，其中夸克-反夸克对负责轻子对的产生。我们分析了这些 QED 贡献对预期标准模型背景和新物理学探索的影响。在后一种情况下，我们使用顺序标准模型（SSM）预测的超重 Z′-玻色子的产生作为基准过程。
We present a study of di-lepton production at the CERN Large Hadron Collider with a particular focus on the contribution resulting from both real and virtual photons in the initial state. We discuss the region of phase space in which the invariant mass of the lepton pair is of the order of several TeV, where searches for new physics phenomena yielding a di-lepton signature are presently carried out. We study both the yield and associated uncertainties for all possible topologies in photon-induced di-lepton production and compare these with what is expected in the standard Drell–Yan channel, where quark–antiquark pairs are responsible for the production of lepton pairs. We analyse the impact of these QED contributions on the expected Standard Model background and on searches for new physics. In this latter case, we use the production of an extra heavy Z′-boson predicted by the Sequential Standard Model (SSM) as a benchmark process.