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arXiv 2202.12097hep-phhep-ex
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在$e^+e^-$对撞机上区分两种暗物质组分粒子

Distinguishing two dark matter component particles at $e^+e^-$ colliders

Subhaditya Bhattacharya, Purusottam Ghosh, Jayita Lahiri, Biswarup Mukhopadhyaya

摘要:

在这项工作中,我们证明了一个扭曲的双峰像丢失的能量($\slashed{E}$)或丢失的横向动量($\slashed{E}_T$)或丢失的质量($\slashed{M}$)分布在$e^+e^-$对撞机可能暗示对存在的多体暗扇区。我们说明的现象,使用两个组件的暗物质(DM)模型,涉及一个惰性的标量双峰下的$\mathcal{Z}_2$对称性稳定提供一个标量DM,一个矢量,如费米子双峰和右手费米子单线态下的不同的$\mathcal{Z}^{'}_2$提供一个费米子DM稳定。我们指出的区域的参数空间中的重带电粒子的生产和随后的衰减DM产量双峰行为后,满足DM约束的$\slashed{E}$频谱。重要的是,我们说明了为什么以及如何$\slashed{E}$作为一个更好的变量比$\slashed{E}_T$在区分两个组件DM框架,因此如何国际直线对撞机(ILC)比正在进行的大型强子对撞机(LHC)。通过对标准模型(SM)背景贡献的详细分析,提出了一套识别和分离$\slashed{E}$谱中第二峰的标准。

英文摘要:

In this work we demonstrate that a distorted double hump like missing energy ($\slashed{E}$) or missing transverse momentum ($\slashed{E}_T$) or missing mass ($\slashed{M}$) distribution at $e^+e^-$ colliders may hint towards the presence of multipartite dark sector. We illustrate the phenomena using a two component dark matter (DM) model involving an inert scalar doublet stabilised under a $\mathcal{Z}_2$ symmetry providing a scalar DM, one vector like fermion doublet and a right handed fermion singlet both stabilised under a different $\mathcal{Z}^{'}_2$ providing a fermion DM. We indicate the region of parameter space where the production of the heavy charged particles and their subsequent decay to DM yield double peak behaviour in $\slashed{E}$ spectrum after satisfying DM constraints. Importantly, we illustrate why and how $\slashed{E}$ serves as a better variable than $\slashed{E}_T$ in distinguishing two component DM frameworks and therefore how International Linear Collider (ILC) does better than the ongoing Large Hadron Collider (LHC). We also chalk out a set of criteria to identify and segregate the second peak in $\slashed{E}$ spectrum, after a careful analysis of the corresponding Standard Model (SM) background contribution, which plays a crucial role.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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