论文标题
在2-Higgs Doublet型号II中探测带有矢量样Quarks的带电的Higgs玻色子
Probing Charged Higgs Bosons in the 2-Higgs Doublet Model Type-II with Vector-Like Quarks
论文作者
论文摘要
我们研究了带电的希格斯玻色子（$ h^\ pm $）和类似矢量的夸克（VLQ）的现象学，称为$ t $，后者在两个Higgs Doublet doublet型型号（2Hdm-ii）的框架内具有与顶级夸克相同的电荷。在检查了两种情况下，一种带有单曲$（t）$（2hdm-ii+$（t）$），另一个具有Doublet $（TB）$（2hdm-ii+$（TB）$），我们发现VLQ的存在对（PSEUDO）scalar扇区具有重大影响，对（Pseudo）scector scalar scaltector of 2hdm-ii。特别是，这导致对带电的希格斯玻色子的质量严格限制，这是由$ b $ physics可观察物施加的，特别是$ b \ tox_sγ$。 {观察到的还原源于带电的希格斯耦合到标准模型（SM）顶部和底部夸克}的修改。值得注意的是，这种减少的程度在2HDM+$（T）$和DOBLET 2HDM+$（TB）$方案之间差异很大。此外，我们的调查扩展到了VLQ混合角上的斜参数$ s $和$ t $所施加的约束。此外，为了促进对“ 2hdm-ii+vlq”参数空间的有效探索，我们在VLQ的生产中呈现结果的结果（$ pp \ to t \ bar t $），然后是$ t \ to H^\ pm b $和$ h^\ h^\ h^\ pm \ to tb $ pm \ to tb $ decs nonticle $ $ $ $ 2tt4b $ 2T4B $ 2T4B。因此，这项调查提供了有价值的见解，以指导在CERN的大型强子对撞机（LHC）上寻找扩展的希格和夸克部门的搜索。
We study the phenomenology of charged Higgs bosons ($H^\pm$) and Vector-Like Quarks (VLQs), denoted as $T$, the latter possessing a charge identical to the top quark one, within the framework of the Two Higgs Doublet Model Type-II (2HDM-II). Upon examining two scenarios, one featuring a singlet $(T)$ (2HDM-II+$(T)$) and another a doublet $(TB)$ (2HDM-II+$(TB)$), we discover that the presence of VLQs has a significant effect on the (pseudo)scalar sector of the 2HDM-II. In particular, this leads to a reduction in the strict constraint on the mass of the charged Higgs boson, which is imposed by $B$-physics observables, specifically $B\to X_sγ$. {The observed reduction stems from modifications in the charged Higgs couplings to the Standard Model (SM) top and bottom quarks}. Notably, the degree of this reduction varies distinctly between the singlet 2HDM+$(T)$ and doublet 2HDM+$(TB)$ scenarios. Additionally, our investigation extends to constraints imposed by the oblique parameters $S$ and $T$ on the VLQ mixing angles. Furthermore, to facilitate efficient exploration of the '2HDM-II+VLQ' parameter space, we present results on pair production of VLQs $T$ ($pp\to T\bar T$), followed by $T\to H^\pm b$ and $H^\pm \to tb$ decays, yielding a distinctive $2t4b$ final state. This investigation thus provides valuable insights guiding the search for extended Higgs and quark sectors at the Large Hadron Collider (LHC) at CERN.
