Search for W′ signal via tW′ associated production at the LHC

被引：1
作者：
Gong, Xue [1 ]
Li, Hong-Lei [2 ,3 ]
Qiao, Cong-Feng [3 ]
Si, Zong-Guo [1 ]
Yang, Zhong-Juan [4 ]
机构：
[1] Shandong Univ, Sch Phys, Jinan 250100, Shandong, Peoples R China
[2] Univ Jinan, Sch Phys & Technol, Jinan 250022, Shandong, Peoples R China
[3] Univ Chinese Acad Sci, Dept Phys, Beijing 100049, Peoples R China
[4] Henan Polytech Univ, Sch Phys & Chem, Jiaozuo 454003, Henan, Peoples R China
来源：
PHYSICAL REVIEW D | 2014年 / 89卷 / 05期
基金：
美国国家科学基金会;
关键词：
LEFT-RIGHT SYMMETRY; PP COLLISIONS; ROOT-S=7 TEV; CP VIOLATION; GAUGE BOSON; LEPTON; PARITY; MASS; CONSERVATION; DIMENSIONS;
D O I：
10.1103/PhysRevD.89.055022
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A variety of new physics models predict the existence of extra charged gauge bosons (W'). It is verified that W ' and top quark associated production is a promising process to search for the W' signal at the LHC. We study the collider signatures of multijets + lepton + is not an element of(Tau) by reconstructing the tW ' intermediate state through the decay modes of W'-> tb, W' -> q (q) over bar' and W'-> lv, respectively. An angular distribution related to charged lepton and top quark moving direction is provided to distinguish alternative left-handed or right-handed chiral couplings of W' to quarks in the hadronic decay modes. The superiority on the search of W' is demonstrated in the leptonic decay channel for the left-handed type interaction, which is forbidden for the right-handed type interaction in the most theories. To be more realistic, the relevant standard model backgrounds are simulated. We adopt various kinematic cuts to suppress the backgrounds and collect the integral luminosity needed for the corresponding process detected at the LHC with 3 sigma sensitivity. We also provide a forward-backward asymmetry which is related to the chirality of W'. The successive studies can shed light on the potential searching for the W' signal as well as distinguishing typical new physics models.
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页数：10
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