论文标题
Faser的轻标量
Light Scalars at FASER
论文作者
论文摘要
FASER是正向搜索实验，是当前在大型强子对撞机（LHC）的当前操作实验，可以检测在LHC相互作用点的正向区域中产生的光长寿命颗粒。在本文中，我们研究了在Faser和Faser 2上检测光线和CP-ODD标量的前景。考虑一个独立于模型的框架，描述了使用有效的lagrangian中构图的符号符号的量表，并开发了量表形式的量表和量表量表，并使用有效的scor salariss condece and cop-odd标量和sm粒子之间的CP-e-e-e-e-e-e-odd标量和sm粒子之间的相互作用。然后，我们将FASER和FASER 2的光线范围分析在案例研究的I Type-I Type 2 Higgs双重模型的大$ \TANβ$区域中，其中可以容纳具有相对较长寿命的光标量。在我们考虑的两个基准方案中，光（伪）标量衰减长度在$（10^{ - 8}，10^5）$米中变化。 FASER和FASER 2都可以在大型$ \tanβ$区域中探测很大一部分参数空间，最高$ 10^5 $，超出了其他现有实验的约束。
FASER, the ForwArd Search ExpeRiment, is a currently operating experiment at the Large Hadron Collider (LHC) that can detect light long-lived particles produced in the forward region of the LHC interacting point. In this paper, we study the prospect of detecting light CP-even and CP-odd scalars at FASER and FASER 2. Considering a model-independent framework describing the most general interactions between a CP-even or CP-odd scalar and SM particles using the notation of coupling modifiers in the effective Lagrangian, we develop the general formalism for the scalar production and decay. We then analyze the FASER and FASER 2 reaches of light scalars in the large $\tanβ$ region of the Type-I two Higgs double model as a case study, in which light scalars with relatively long lifetime could be accommodated. In the two benchmark scenarios we considered, the light (pseudo)scalar decay length varies in $(10^{-8}, 10^5)$ meters. Both FASER and FASER 2 can probe a large part of the parameter space in the large $\tanβ$ region up to $10^5$, extending beyond the constraints of the other existing experiments.
