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Pair production of charged IDM scalars at high energy CLIC

by Jan Klamka

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Authors (as registered SciPost users): Jan Klamka
Submission information
Preprint Link:  (pdf)
Date submitted: 2021-07-30 11:42
Submitted by: Klamka, Jan
Submitted to: SciPost Physics Proceedings
Proceedings issue: 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021)
Ontological classification
Academic field: Physics
  • High-Energy Physics - Experiment


The Compact Linear Collider (CLIC) was proposed as the next energy-frontier infrastructure at CERN, to study e$^+$e$^-$ collisions at three centre-of-mass energy stages: 380 GeV, 1.5 TeV and 3 TeV. The main goal of its high-energy stages is to search for the new physics beyond the Standard Model (SM). The Inert Doublet Model (IDM) is one of the simplest SM extensions and introduces four new scalar particles: H$^\pm$, A and H; the lightest, H, is stable and hence a natural dark matter (DM) candidate. A set of benchmark points is considered, which are consistent with current theoretical and experimental constraints and promise detectable signals at future colliders. Prospects for observing pair-production of the IDM scalars at CLIC were previously studied using signatures with two leptons in the final state. In the current study, discovery reach for the IDM charged scalar pair-production is considered for the semi-leptonic final state at the two high-energy CLIC stages. Full simulation analysis, based on the current CLIC detector model, is presented for five selected IDM scenarios. Results are then extended to the larger set of benchmarks using the Delphes fast simulation framework. The CLIC detector model for Delphes has been modified to take pile-up contribution from the beam-induced $\gamma\gamma$ interactions into account, which is crucial for the presented analysis. Results of the study indicate that heavy, charged IDM scalars can be discovered at CLIC for most of the proposed benchmark scenarios, with very high statistical significance.

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Reports on this Submission

Anonymous Report 1 on 2022-2-28 (Invited Report)

  • Cite as: Anonymous, Report on arXiv:2107.13803v1, delivered 2022-02-28, doi: 10.21468/SciPost.Report.4561


The paper, "Pair production of charged IDM scalars at high energy CLIC", describes the Inert Doublet Model, a natural extension to the standard model, in which 4 beyond the standard model particles are predicted. Specifically a study is performed for the discovery reach of two high energy CLIC stages in which a semi-leptonic decay of the pair produced IDM particles is detected. The author succinctly covers the theoretical justification for the search, and explains the signal and background that would need to be understood in the analysis of the actual data measured by the future CLIC.

There are a few minor comments that should be considered before the paper is published. It would be preferable to have a slightly more extended discussion of the difference between the 23 benchmark scenarios. While there is a brief statement that the scenarios cover all the interesting parameter space proposed by future lepton colliders, it would round out the discussion contained in this paper to expand on the differences between the scenarios. Figure 3 was quite useful in this regard, as it showed the different 2m_H^{\pm} mass values in the benchmark scenarios. In a similar vein, a little more explanation of the HP17 and BP23 scenarios might improve clarity in this document.

The suggested added discussion does not need to be comprehensive, but adding a few sentences to improve clarity would be appreciated.

I believe this paper satisfies the requirements of this journal once the above comments are taken into consideration.

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