在 14 TeV 大型强子对撞机上单次产生带电荷 5/3 的矢量类夸克

IF 2.5 3区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

Nuclear Physics B Pub Date : 2024-08-30 DOI:10.1016/j.nuclphysb.2024.116667

Yao-Bei Liu, Bo Hu, Chao-Zheng Li

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引用次数: 0

摘要

在标准模型（SM）简单扩展的 SU(2) 双重（X,T）框架内，包括电荷为 |QX|=5/3的矢量类 X 夸克（VLQ-X），我们研究了在 s=14 TeV 运行的大型强子对撞机（LHC）上，VLQ-X 与第一代和第三代夸克之间的耦合所诱发的 VLQ-X 的单次产生。该信号在包括同符号二重子（电子或μ介子）、一个b标记喷流和缺失能量的事件中进行搜索，其中X夸克被假定衰变为一个顶夸克和一个W玻色子，两者都以轻子方式衰变。在对信号和背景事件进行快速模拟之后，在大型强子对撞机上分别以 300 和 3000 fb-1 的综合光度获得了 95% CL 排除极限和 5σ 发现范围。

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Single production of vectorlike quarks with charge 5/3 at the 14 TeV LHC

In a framework of the Standard Model (SM) simply extended by an SU(2) doublet $(X, T)$ including a vectorlike X-quark (VLQ-X), with electric charge $| Q_{X} | = 5 / 3$ , we investigate the single production of the VLQ-X induced by the couplings between the VLQ-X with the first and the third generation quarks at the Large Hadron Collider (LHC) operating at $\sqrt{s} = 14$ TeV. The signal is searched in events including same-sign dileptons (electrons or muons), one b-tagged jet and missing energy, where the X quark is assumed to decay into a top quark and a W boson, both decaying leptonically. After a rapid simulation of signal and background events, the 95% CL exclusion limits and the 5σ discovery reach are respectively obtained at the LHC with an integrated luminosity of 300 and 3000 fb⁻¹, respectively.

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来源期刊

Nuclear Physics B 物理-物理：粒子与场物理

CiteScore

5.50

自引率

7.10%

发文量

302

审稿时长

1 months

期刊介绍： Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.