scholarly journals Electroweak multiplet dark matter at future lepton colliders

2019 ◽  
Vol 2019 (2) ◽  
Author(s):  
Kenji Kadota ◽  
Andrew Spray
Keyword(s):  
Dark Matter ◽  
Lepton Colliders

scholarly journals Leptophilic bosons and muon g-2 at lepton colliders

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Eung Jin Chun ◽  
Tanmoy Mondal
Keyword(s):  
Dark Matter ◽  
Parameter Space ◽  
Higgs Doublet ◽  
Lepton Colliders ◽  
Doublet Model ◽  
Two Higgs Doublet Model

Abstract A light leptophilic boson (scalar or pseudoscalar) has been postulated to explain the muon g-2 anomaly and could be a portal to dark matter. Realizing the leptophilic nature of a singlet boson in the framework of the two-Higgs-doublet-Model of type-X, we identify the parameter space viable for the explanation of the updated muon g-2 discrepancy. It is then shown that such a hypothetical particle will be unambiguously ruled out or discovered via the Yukawa process at a lepton collider designed as a Higgs factory.

scholarly journals Searching for lepton portal dark matter with colliders and gravitational waves

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Jia Liu ◽  
Xiao-Ping Wang ◽  
Ke-Pan Xie
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Scalar Potential ◽  
Majorana Fermion ◽  
Charged Scalar ◽  
First Order Phase Transition ◽  
Lepton Colliders ◽  
The Standard Model ◽  
Relic Abundance ◽  
First Order Phase

Abstract We study the lepton portal dark matter (DM) model in which the relic abundance is determined by the portal coupling among the Majorana fermion DM candidate χ, the singlet charged scalar mediator S± and the Standard Model (SM) right-handed lepton. The direct and indirect searches are not sensitive to this model. This article studies the lepton portal coupling as well as the scalar portal coupling (between S± and SM Higgs boson), as the latter is generally allowed in the Lagrangian. The inclusion of scalar portal coupling not only significantly enhances the LHC reach via the gg → h* → S+S− process, but also provides a few novel signal channels, such as the exotic decays and coupling devi- ations of the Higgs boson, offering new opportunities to probe the model. In addition, we also study the Drell-Yan production of S+S− at future lepton colliders, and find out that the scenario where one S± is off-shell can be used to measure the lepton portal coupling directly. In particular, we are interested in the possibility that the scalar potential triggers a first-order phase transition and hence provides the stochastic gravitational wave (GW) signals. In this case, the terrestrial collider experiments and space-based GW detectors serve as complementary approaches to probe the model.

scholarly journals Searching for GeV-scale Majorana Dark Matter: inter spem et metum

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Adil Jueid ◽  
Salah Nasri ◽  
Rachik Soualah
Keyword(s):  
Dark Matter ◽  
High Energy ◽  
Lepton Sector ◽  
Charged Scalar ◽  
Order Unity ◽  
Lepton Colliders ◽  
The Standard Model ◽  
Experimental Bound ◽  
Nucleus Scattering ◽  
Scalar Singlet

Abstract We suggest a minimal model for GeV-scale Majorana Dark Matter (DM) coupled to the standard model lepton sector via a charged scalar singlet. We show that there is an anti-correlation between the spin-independent DM-Nucleus scattering cross section (σSI) and the DM relic density for parameters values allowed by various theoretical and experimental constraints. Moreover, we find that even when DM couplings are of order unity, σSI is below the current experimental bound but above the neutrino floor. Furthermore, we show that the considered model can be probed at high energy lepton colliders using e.g. the mono-Higgs production and same-sign charged Higgs pair production.

scholarly journals Role of future lepton colliders for fermionic Z -portal dark matter models

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
Dilip Kumar Ghosh ◽  
Taisuke Katayose ◽  
Shigeki Matsumoto ◽  
Ipsita Saha ◽  
Satoshi Shirai ◽  
...  
Keyword(s):  
Dark Matter ◽  
Lepton Colliders

scholarly journals Minimal Dark Matter bound states at future colliders

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Salvatore Bottaro ◽  
Alessandro Strumia ◽  
Natascia Vignaroli
Keyword(s):  
Dark Matter ◽  
Cross Sections ◽  
Bound States ◽  
Characteristic Pattern ◽  
Production Rates ◽  
Quantum Numbers ◽  
Lepton Colliders ◽  
Muon Collider

Abstract The hypothesis that Dark Matter is one electroweak multiplet leads to predictive candidates with multi-TeV masses that can form electroweak bound states. Bound states with the same quantum numbers as electroweak vectors are found to be especially interesting, as they can be produced resonantly with large cross sections at lepton colliders. Such bound states exist e.g. if DM is an automatically stable fermionic weak 5-plet with mass M ≈ 14 TeV such that the DM abundance is reproduced thermally. In this model, a muon collider could resolve three such bound states. Production rates are so large that details of DM spectroscopy can be probed with larger statistics: we compute the characteristic pattern of single and multiple γ lines.

scholarly journals Determining the dark matter particle mass through antler topology processes at lepton colliders

2014 ◽  
Vol 90 (11) ◽  
Author(s):  
Neil D. Christensen ◽  
Tao Han ◽  
Zhuoni Qian ◽  
Josh Sayre ◽  
Jeonghyeon Song ◽  
...  
Keyword(s):  
Dark Matter ◽  
Dark Matter Particle ◽  
Particle Mass ◽  
Lepton Colliders

scholarly journals Shining light on the scotogenic model: interplay of colliders and cosmology

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Sven Baumholzer ◽  
Vedran Brdar ◽  
Pedro Schwaller ◽  
Alexander Segner
Keyword(s):  
Dark Matter ◽  
Neutrino Masses ◽  
Production Mechanism ◽  
High Luminosity ◽  
Missing Energy ◽  
Final State ◽  
Lepton Colliders ◽  
Matter Component ◽  
Freeze Out

Abstract In the framework of the scotogenic model, which features radiative generation of neutrino masses, we explore light dark matter scenario. Throughout the paper we chiefly focus on keV-scale dark matter which can be produced either via freeze-in through the decays of the new scalars, or from the decays of next-to-lightest fermionic particle in the spectrum, which is produced through freeze-out. The latter mechanism is required to be suppressed as it typically produces a hot dark matter component. Constraints from BBN are also considered and in combination with the former production mechanism they impose the dark matter to be light. For this scenario we consider signatures at High Luminosity LHC and proposed future hadron and lepton colliders, namely FCC-hh and CLIC, focusing on searches with two leptons and missing energy as a final state. While a potential discovery at High Luminosity LHC is in tension with limits from cosmology, the situation greatly improves for future colliders.

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