Dark coloured scalars impact on single and di-Higgs production at the LHC

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2025-01-27 DOI:10.1140/epjc/s10052-025-13741-w

Pedro Gabriel, Margarete Mühlleitner, Daniel Neacsu, Rui Santos

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Abstract

The search for Dark Matter (DM) at colliders is primarily pursued via the detection of missing energy in particular final states. These searches are based on the production and decay processes where final states include DM particles and at least one Standard Model (SM) particle. DM will then reveal itself as missing energy. An alternative form to get a hint of a dark sector is via loop contribution to SM processes. In this case, it is not even relevant if the new particles have their origin in the dark sector of the model. In this work we discuss the impact of an arbitrary number of coloured scalars with \(Z_2\)-odd parity in single Higgs and double Higgs production at the Large Hadron Collider (LHC), and we show their complementarity. We determine the range of variation of the corrections relative to the SM for an arbitrary number of coloured scalars n. We discuss the cases \(n=1\) and \(n=2\) for a specific model in more detail, which includes direct searches at the LHC. We also find that the electroweak observable T parameter imposes significant restrictions on the difference of the heavy coloured scalar masses.

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深色标量对大型强子对撞机单希格斯粒子和双希格斯粒子产生的影响

在对撞机上寻找暗物质（DM）主要是通过探测特定终态中缺失的能量来实现的。这些搜索是基于产生和衰变过程，其中最终状态包括DM粒子和至少一个标准模型（SM）粒子。DM就会显示为丢失的能量。另一种获得暗区提示的形式是通过循环对SM过程的贡献。在这种情况下，如果新粒子的起源在模型的暗区，它甚至都无关紧要。在这项工作中，我们讨论了在大型强子对撞机（LHC）的单希格斯和双希格斯生产中具有\(Z_2\) -奇宇称的任意数量的彩色标量的影响，并证明了它们的互补性。对于任意数量的彩色标量n，我们确定了相对于SM的修正的变化范围。我们更详细地讨论了特定模型的情况\(n=1\)和\(n=2\)，其中包括在LHC上的直接搜索。我们还发现电弱可观测的T参数对重色标量质量的差有显著的限制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.