论文标题
$ u（1）_ {l_μ-l_τ} $模型的CDF W-MASS，MUON G-2和暗物质与矢量样lepton
The CDF W-mass, muon g-2, and dark matter in a $U(1)_{L_μ-L_τ}$ model with vector-like leptons
论文作者
论文摘要
我们在本地$ u（1）_ {l_μ-l_τ} $模型中研究CDF $ W $ -MASS，MUON $ G-2 $和暗物质可观察物，其中新粒子包括三个向量的leptons（$ e_1，〜e_1，〜e_2，〜n $） $ u（1）_ {l_μ-l_τ} $），标量暗物质$ x_i $及其合作伙伴$ x_r $。我们发现CDF $ W $ -MASS DESDAVORS $ M_ {E_1} = M_ {E_2} = {M_n} $或$ S_L = S_R = 0 $ WHEW $ s_ {l（r）} $是左（右） - 右侧（右） - 右）的vector参数。当$ s_l $和$ s_r $之间的差异很小时，很喜欢$ e_1 $和$ e_2 $之间的大质量分裂。可以同时解释MUON $ G-2 $异常，以$ s_l $ $（M_ {E_1}）$和$ S_R $ $（M_ {E_2}）$之间的适当差异，并且某些区域被125 GEV HIGGS的Diphoton信号数据排除在外。结合CDF $ W $ - 质量，Muon $ g-2 $异常和其他相关约束，正确的暗物质物质密度主要在两个不同的情况下获得：（i）$ x_ix_i \ to z'z'，〜ss $ for $ m_ {z'}（m__s）（m_s）（m_s）<m_ m__s <m_} $ min（m_ {e_1}，m_ {e_2}，m_n，m_ {x_r}）$关闭至$ m_ {x_i} $。最后，我们使用直接搜索在LHC上的$ 2 \ ell+e_t^{MISS} $事件来限制模型，并显示类似矢量的Leptons和Dark Matter的允许的质量范围。
We study the CDF $W$-mass, muon $g-2$, and dark matter observables in a local $U(1)_{L_μ-L_τ}$ model in which the new particles include three vector-like leptons ($E_1,~ E_2,~ N$), a new gauge boson $Z'$, a scalar $S$ (breaking $U(1)_{L_μ-L_τ}$), a scalar dark matter $X_I$ and its partner $X_R$. We find that the CDF $W$-mass disfavors $m_{E_1}= m_{E_2}={m_N}$ or $s_L=s_R=0$ where $s_{L(R)}$ is mixing parameter of left (right)-handed fields of vector-like leptons. A large mass splitting between $E_1$ and $E_2$ is favored when the differences between $s_L$ and $s_R$ becomes small. The muon $g-2$ anomaly can be simultaneously explained for appropriate difference between $s_L$ $(m_{E_1})$ and $s_R$ $(m_{E_2})$, and some regions are excluded by the diphoton signal data of the 125 GeV Higgs. Combined with the CDF $W$-mass, muon $g-2$ anomaly and other relevant constraints, the correct dark matter relic density is mainly obtained in two different scenarios: (i) $X_IX_I\to Z'Z',~ SS$ for $m_{Z'}(m_S)<m_{X_I}$ and (ii) the co-annihilation processes for $min(m_{E_1},m_{E_2},m_N,m_{X_R})$ closed to $m_{X_I}$. Finally, we use the direct searches for $2\ell+E_T^{miss}$ event at the LHC to constrain the model, and show the allowed mass ranges of the vector-like leptons and dark matter.
