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Top partner search in T to tZ channel of Minimal Composite Higgs Model at the LHC
Thesis

Top partner search in T to tZ channel of Minimal Composite Higgs Model at the LHC

Wu, Guan Wei
Masters, 國立清華大學, 物理系
2014

Abstract

頂夥伴 大強子對撞機 現象學 Top partner LHC Phenomenology
We all know the Standard Model cannot describe all phenomena emerging from modern experiments. Apparently, it must exists a Beyond Standard Model which can satisfy some or all phenomena. In the beginning, we at- tempt to solve the Hierarchy problem which has disturbed at the physicist so far. In brief, that means we are able to find one new particle at least on TeV energy scale at the Large Hadron Collider (LHC). Following the Minimal Composite Higgs Model (MCHM), it bases on a large symmetry SO(5)/SO(4) in strong dynamic sector above electroweak scale v. Therefore, it predicts heavy fermionic quarks (top partners) at the TeV energy order. We apply several analysis tools, such as Feynrule, Mad- graph 5, and MadAnalysis 5, doing simulations for those extra fermionic quarks at 14 TeV and luminosity equals to 300fb−1. For illumination, we use ”Singlet T Model”, which only remains a charge 2/3 top partner mixing with Standard Model by Yukawa interaction. Fur- thermore, we employ a model independent framework, which can apply in any models with extra vector-like quarks, as simplified model approach. For instance, you can use the model independent framework in Little Higgs Model (LHM) with T parity. As we know that the Singlet T Model is the most simplest case in MHCM. However, There are still a number of ways to assign the representation and the interaction between the different charge of vector-like quarks. It is totally beyond this work and others group have done a few researches. As a result, we will represent the probability to discover the new state in T → tZ channel.

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