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arXiv 2203.06323hep-ph
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I(2+1)HDM中的$Z_3$软破缺及其在当前和未来对撞机上的探索

The $Z_3$ soft breaking in the I(2+1)HDM and its probes at present and future colliders

D. Hernández-Otero, J. Hernández-Sánchez, S. Moretti, T. Shindou

摘要:

本文研究了一个具有两个惰性偶态和一个活性偶态的$ Z_3 $对称3-Higgs偶态模型(3 HDM),即所谓的I(2+1)HDM.我们讨论的行为时,允许一个$ Z_3 $软破断长期的3 HDM实现。这种对称性使得双组分暗物质(DM)以“雌雄同体DM”的形式存在,其中两个惰性候选者具有相反的CP宇称,并受到这种离散对称性的保护,不会衰变为标准模型(SM)粒子。此外,这两个DM态是潜在地彼此可区分的,因为它们不能被归入一个复杂的场,具有不同的质量和规范耦合。考虑到这一点,我们研究微分光谱具有独特的形状,从其中可以很容易地推断出两个不同的DM组件分布的存在。我们证明这是可能的,在大型强子对撞机(LHC)通过$q\bar{q} \to 2l+H_1H_1$和$q\bar{q} \to 2l+A_1A_1$过程,以及在未来的电子-正电子机通过$e^{+}e^{-} \to 2l+H_1H_1$和$e^{+}e^{-} \to 2l+A_1A_1$通道,其中$l=e,μ$。

英文摘要:

A $ Z_3 $ symmetric 3-Higgs Doublet Model (3HDM) with two inert doublets and one active doublet (that plays the role of the Higgs doublet), the so-called I(2+1)HDM, is studied. We discuss the behaviour of this 3HDM realisation when one allows for a $ Z_3 $ soft breaking term. Such a symmetry enables the presence of a two-component Dark Matter (DM) scenario in the form of "Hermaphrodite DM", where the two inert candidates have opposite CP parity and are protected by this discrete symmetry from decaying into Standard Model (SM) particles. Furthermore, the two DM states are potentially distinguishable from each other as they cannot be subsumed into a complex field, having different masses and gauge couplings. With this in mind, we study differential spectra with a distinctive shape from which the existence of two different DM component distributions could be easily inferred. We prove this to be possible at the Large Hadron Collider (LHC) via the $q\bar{q} \to 2l+H_1H_1$ and $q\bar{q} \to 2l+A_1A_1$ processes as well as at a future electron-positron machine via the $e^{+}e^{-} \to 2l+H_1H_1$ and $e^{+}e^{-} \to 2l+A_1A_1$ channels, where $l=e,μ$.

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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