论文标题
敏感性和对2HDM软性破坏$ z_2 $参数$ m_ {12} $的限制
Sensitivity and constraints to the 2HDM soft-breaking $Z_2$ parameter $m_{12}$
论文作者
论文摘要
在这封信中，我们研究了两个higgs doublet模型（2HDM）的软性破坏$ z_2 $参数$ m_ {12} $的特定敏感性和约束。 $ m_ {12} $在这里被视为模型的输入参数，以及higgs玻色子的质量，$ m_h $，$ m_h $，$ m_a $，$ m_a $，$ m_ {h^\ pm pm} $混合$ \ Mathcal {cp} $的角度 - 偶数和$ \ Mathcal {cp} $ - Odd Higgs sector。我们特别探讨了在最轻的higgs玻色子$ h $对两个光子的衰减中对$ m_ {12} $的敏感性，假设：1）是：1）是在$ \ sim 125 \ sim 125 \ \ \ \ \ \ \ \ \ m mathrm {gev} $的$ \ sim 125 \ sim 125 \ sim {gev} $上观察到的状态。 $ \ cos（β-α）= 0 $。这项工作的目的是从目前的di-photon信号强度（$μ__{γγ} $的$ m_ {12} $上证明对$ M_ {12} $的可能约束。这些约束与2HDM参数空间的区域相关，该区域由所有其他约束允许，特别是理论约束以及LHC HIGGS速率测量值的实验约束，HIGGS玻色子搜索，风味物理学和精确观察值。探索是在2HDM的四种不同的Yukawa类型中进行的，其中所有其他约束都取决于模型类型。我们还分析了Higgs-Boson质谱的案例，包括最近的CDF测量值，包括$ M_W $的新世界平均水平。
In this letter we study the specific sensitivity and constraints to the soft breaking $Z_2$ parameter $m_{12}$ of the Two Higgs Doublet Model (2HDM). $m_{12}$ is considered here as an input parameter of the model together with the masses of the Higgs bosons, $m_h$, $m_H$, $m_A$, $m_{H^\pm}$, the ratio of the two Higgs vacuum expectation values, $\tan β$, and $\cos(β-α)$, with $α$ and $β$ the mixing angles of the $\mathcal{CP}$-even and $\mathcal{CP}$-odd Higgs sector, respectively. We explore in particular the sensitivity to $m_{12}$ in the decays of the lightest Higgs boson $h$ to two photons, assuming: 1) that $h$ is the state observed at the LHC at $\sim 125 \ \mathrm{GeV}$, and 2) the $h$ couplings to the SM particles are SM-like, by going to the alignment limit, $\cos(β-α) = 0$. The aim of this work is to demonstrate possible constraints on $m_{12}$ from the present measurement of the di-photon signal strength, $μ_{γγ}$. These constraints are relevant in the region of the 2HDM parameter space that is allowed by all the other constraints, specifically, theoretical constraints as well as experimental constraints from LHC Higgs rate measurements, Higgs boson searches, flavor physics and precision observables. The exploration is performed in the four different Yukawa types of 2HDM, where the allowed region by all the other constraints depends on the model type. We also analyze the case that the Higgs-boson mass spectrum accommodates a possible new world average of $m_W$ including the recent CDF measurement.
