Hadronic b' search at the LHC with top and W taggers

被引：17
|
作者：
Yang, Shuo [1 ]
Jiang, Ji [2 ]
Yan, Qi-Shu [3 ,4 ]
Zhao, Xiaoran [3 ]
机构：
[1] Dalian Univ, Dept Phys, Dalian 116622, Peoples R China
[2] Zhengzhou Univ, Dept Phys, Zhengzhou 450001, Peoples R China
[3] Univ Chinese Acad Sci, Coll Phys Sci, Beijing 100039, Peoples R China
[4] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2014年 / 09期
基金：
美国国家科学基金会;
关键词：
Jets; Monte Carlo Simulations; ARTIFICIAL NEURAL-NETWORKS; BOOSTED DECISION TREES;
D O I：
10.1007/JHEP09(2014)035
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study the sensitivity of a down type quark b' via process pp -> -> using jet substructure methods at the LHC with the collision energy = 14 TeV. We consider the case that the b' is heavy (say from 800 GeV to 1500 GeV) and concentrate on the feasibility of the full hadronic mode. Both top tagger (the HEP top tagger) and W tagger (the CMS W-tagging) are used to reconstruct all objects in the final states. In order to suppress huge SM background events and take into account various cases with different number of boosted objects, we propose a comprehensive reconstruction procedure so as to extract the most crucial observables of the signal events. When b' mass is 1 TeV, it is found that with a 200 fb(-1) dataset, the LHC may be able to detect the b' with a significance up to 10 or better. With a 3000 f b (-1) dataset, the LHC may be able to probe the b' with a mass around up to 2 TeV, only by using the hadronic mode.
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页数：24
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