Collider constraints on dark mediators

Abstract We explore the constraints current collider searches place on a QCD-like dark sector. A combination of multi-jet, multi-jet plus missing energy and emerging jets searches is used to derive constraints on the mediator mass across the full range of the dark meson lifetimes for the first time.The dark sector inherits a flavour structure from the coupling between the dark quarks and the SM quarks through the mediator. When this is taken into account, the differently flavoured dark pions become distinguishable through their lifetime. We show that also in these cases the above mentioned searches remain sensitive, and we obtain limits on the mediator mass also for the flavoured scenario.We then contrast the constraints from collider searches with direct detection bounds on the dark matter candidate itself in both the flavoured and unflavoured scenario. Using a simple prescription it becomes possible to display all constraints in the dark matter and mediator mass plane. Constraints from direct detection tend to be stronger than the collider constraints, unless the coupling to the first generation quarks is suppressed, in which case the collider searches place the most stringent limits on the parameter space.

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Dark Matter Constraints and the Neutralino Sector of the scNMSSM

Universe ◽

10.3390/universe7020031 ◽

2021 ◽

Vol 7 (2) ◽

pp. 31

Author(s):

Elham Aldufeery ◽

Maien Binjonaid

Keyword(s):

Dark Matter ◽

Parameter Space ◽

Cross Sections ◽

Direct Detection ◽

Mass Range ◽

Upper And Lower Bounds ◽

Dark Matter Candidate ◽

Dark Matter Relic Density ◽

Relic Density ◽

Moderate Range

The neutralino sector of the semi-constrained next-to-minimal supersymmetric standard model is explored under recent experimental constraints, with special attention to dark matter (DM) limits. The effects of the upper and lower bounds of dark matter relic density and recent direct detection constraints on spin-independent and -dependent cross-sections are thoroughly analyzed. Particularly, we show which regions of the parameter space are ruled out due to the different dark matter constraints and the corresponding model-specific parameters: λ,κ,Aλ, and Aκ. We analyze all annihilation and co-annihilation processes (with heavier neutralinos and charginos) that contribute to the dark matter relic density. The mass components of the dark matter candidate, the lightest neutralino χ˜10, are studied, and the decays of heavy neutralinos and charginos, especially χ˜20 and χ˜1+, into the lightest neutralino are examined. We impose semi-universal boundary conditions at the Grand Unified Theory scale, and require a moderate range of tanβ≲10. We find that the allowed parameter space is associated with a heavy mass spectrum in general and that the lightest neutralino is mostly Higgsino with a mass range that resides mostly between 1000 and 1500 GeV. However, smaller mass values can be achieved if the DM candidate is bino-like or singlino-like.

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Model-independent constraints with extended dark matter EFT

Journal of High Energy Physics ◽

10.1007/jhep10(2020)172 ◽

2020 ◽

Vol 2020 (10) ◽

Cited By ~ 1

Author(s):

Tommi Alanne ◽

Giorgio Arcadi ◽

Florian Goertz ◽

Valentin Tenorth ◽

Stefan Vogl

Keyword(s):

Dark Matter ◽

Parameter Space ◽

Direct Detection ◽

Vector Boson ◽

Effective Field ◽

Indirect Detection ◽

Effective Theory ◽

Dark Sector ◽

Model Independent ◽

Relic Abundance

Abstract We systematically explore the phenomenology of the recently proposed extended dark matter effective field theory (eDMeft), which allows for a consistent effective description of DM scenarios across different energy scales. The framework remains applicable at collider energies and is capable of reproducing the correct relic abundance by including a dynamical mediator particle to the dark sector, while maintaining correlations dictated by gauge invariance in a ‘model-independent’ way. Taking into account present and future constraints from direct- and indirect-detection experiments, from collider searches for missing energy and for scalar resonances in vector-boson, di-jet, and Higgs-pair final states, as well as from the relic abundance as measured by Planck, we determine viable regions in the parameter space, both for scalar and pseudoscalar mediator. In particular, we point out regions where cancellations in the direct-detection cross section appear leading to allowed islands for scalar mediators that could be missed in a naive simplified-model approach, but are present in the full D = 5 effective theory, as well as a general opening of the parameter space due to consistently considering all operators at a given mass dimension. Thus, canonical WIMP-like scenarios can survive even the next generation of direct-detection experiments in different mass regimes, while potentially becoming testable at the high-luminosity LHC.

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Complementarity between dark matter direct searches and CEνNS experiments in U(1)′ models

Journal of High Energy Physics ◽

10.1007/jhep09(2021)146 ◽

2021 ◽

Vol 2021 (9) ◽

Author(s):

Leon M. G. de la Vega ◽

L. J. Flores ◽

Newton Nath ◽

Eduardo Peinado

Keyword(s):

Dark Matter ◽

Symmetry Breaking ◽

Spontaneous Symmetry Breaking ◽

Parameter Space ◽

Direct Detection ◽

Dark Matter Candidate ◽

Beam Dump ◽

Reactor Experiment

Abstract We explore the possibility of having a fermionic dark matter candidate within U(1)′ models for CEνNS experiments in light of the latest COHERENT data and the current and future dark matter direct detection experiments. A vector-like fermionic dark matter has been introduced which is charged under U(1)′ symmetry, naturally stable after spontaneous symmetry breaking. We perform a complementary investigation using CEνNS experiments and dark matter direct detection searches to explore dark matter as well as Z′ boson parameter space. Depending on numerous other constraints arising from the beam dump, LHCb, BABAR, and the forthcoming reactor experiment proposed by the SBC collaboration, we explore the allowed region of Z′ portal dark matter.

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Whac-a-constraint with anomaly-free dark matter models

10.21468/scipostphys.6.2.020 ◽

2019 ◽

Vol 6 (2) ◽

Cited By ~ 2

Author(s):

Sonia El Hedri ◽

Karl Nordström

Keyword(s):

Dark Matter ◽

Standard Model ◽

Parameter Space ◽

Direct Detection ◽

Simplified Model ◽

Dark Matter Candidate ◽

Minimal Models ◽

Simplified Models ◽

The Standard Model ◽

The One

Theories where a fermionic dark matter candidate interacts with the Standard Model through a vector mediator are often studied using minimal models, which are not necessarily anomaly-free. In fact, minimal anomaly-free simplified models are usually strongly constrained by either direct detection experiments or collider searches for dilepton resonances. In this paper, we study the phenomenology of models with a fermionic dark matter candidate that couples axially to a leptophobic vector mediator. Canceling anomalies in these models requires considerably enlarging their field content. For an example minimal scenario we show that the additional fields lead to a potentially much richer phenomenology than the one predicted by the original simplified model. In particular collider searches for pair-produced neutralinos and charginos can be more sensitive than traditional monojet searches in thermally motivated parts of the parameter space where the mediator is outside the reach of current searches.

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Impact of leptonic unitarity and dark matter direct detection experiments on the NMSSM with inverse seesaw mechanism

Journal of High Energy Physics ◽

10.1007/jhep12(2020)023 ◽

2020 ◽

Vol 2020 (12) ◽

Author(s):

Junjie Cao ◽

Yangle He ◽

Yusi Pan ◽

Yuanfang Yue ◽

Haijing Zhou ◽

...

Keyword(s):

Dark Matter ◽

Parameter Space ◽

Likelihood Function ◽

Direct Detection ◽

Upper Bounds ◽

Dark Matter Candidate ◽

Neutrino Masses ◽

Seesaw Mechanism ◽

Yukawa Couplings ◽

The Impact

Abstract In the Next-to-Minimal Supersymmetric Standard Model with the inverse seesaw mechanism to generate neutrino masses, the lightest sneutrino may act as a feasible dark matter candidate in vast parameter space. In this case, the smallness of the leptonic unitarity violation and the recent XENON-1T experiment can limit the dark matter physics. In particular, they set upper bounds of the neutrino Yukawa couplings λν and Yν. We study such effects by encoding the constraints in a likelihood function and carrying out elaborated scans over the parameter space of the theory with the Nested Sampling algorithm. We show that these constraints are complementary to each other in limiting the theory, and in some cases, they are very strict. We also study the impact of the future LZ experiment on the theory.

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Direct detection of atomic dark matter in white dwarfs

Journal of High Energy Physics ◽

10.1007/jhep03(2021)166 ◽

2021 ◽

Vol 2021 (3) ◽

Author(s):

David Curtin ◽

Jack Setford

Keyword(s):

Dark Matter ◽

Energy Loss ◽

Cooling Rate ◽

White Dwarf ◽

White Dwarfs ◽

Luminosity Function ◽

Direct Detection ◽

Matter Density ◽

Mixing Parameter ◽

First Time

Abstract Dark matter could have a dissipative asymmetric subcomponent in the form of atomic dark matter (aDM). This arises in many scenarios of dark complexity, and is a prediction of neutral naturalness, such as the Mirror Twin Higgs model. We show for the first time how White Dwarf cooling provides strong bounds on aDM. In the presence of a small kinetic mixing between the dark and SM photon, stars are expected to accumulate atomic dark matter in their cores, which then radiates away energy in the form of dark photons. In the case of white dwarfs, this energy loss can have a detectable impact on their cooling rate. We use measurements of the white dwarf luminosity function to tightly constrain the kinetic mixing parameter between the dark and visible photons, for DM masses in the range 10−5–105 GeV, down to values of ϵ ∼ 10−12. Using this method we can constrain scenarios in which aDM constitutes fractions as small as 10−3 of the total dark matter density. Our methods are highly complementary to other methods of probing aDM, especially in scenarios where the aDM is arranged in a dark disk, which can make direct detection extremely difficult but actually slightly enhances our cooling constraints.

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A dark clue to seesaw and leptogenesis in a pseudo-Dirac singlet doublet scenario with (non)standard cosmology

Journal of High Energy Physics ◽

10.1007/jhep03(2021)044 ◽

2021 ◽

Vol 2021 (3) ◽

Author(s):

Partha Konar ◽

Ananya Mukherjee ◽

Abhijit Kumar Saha ◽

Sudipta Show

Keyword(s):

Dark Matter ◽

Thermal History ◽

Direct Detection ◽

Critical Role ◽

Mass Term ◽

Baryon Asymmetry ◽

Dark Sector ◽

Lepton Asymmetry ◽

History Of ◽

The Universe

Abstract We propose an appealing alternative scenario of leptogenesis assisted by dark sector which leads to the baryon asymmetry of the Universe satisfying all theoretical and experimental constraints. The dark sector carries a non minimal set up of singlet doublet fermionic dark matter extended with copies of a real singlet scalar field. A small Majorana mass term for the singlet dark fermion, in addition to the typical Dirac term, provides the more favourable dark matter of pseudo-Dirac type, capable of escaping the direct search. Such a construction also offers a formidable scope to radiative generation of active neutrino masses. In the presence of a (non)standard thermal history of the Universe, we perform the detailed dark matter phenomenology adopting the suitable benchmark scenarios, consistent with direct detection and neutrino oscillations data. Besides, we have demonstrated that the singlet scalars can go through CP-violating out of equilibrium decay, producing an ample amount of lepton asymmetry. Such an asymmetry then gets converted into the observed baryon asymmetry of the Universe through the non-perturbative sphaleron processes owing to the presence of the alternative cosmological background considered here. Unconventional thermal history of the Universe can thus aspire to lend a critical role both in the context of dark matter as well as in realizing baryogenesis.

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Constraining the Inert Doublet Model using Vector Boson Fusion

The European Physical Journal C ◽

10.1140/epjc/s10052-019-7436-6 ◽

2019 ◽

Vol 79 (11) ◽

Cited By ~ 4

Author(s):

Daniel Dercks ◽

Tania Robens

Keyword(s):

Dark Matter ◽

Parameter Space ◽

Vector Boson ◽

Higgs Doublet ◽

Dark Matter Candidate ◽

Final States ◽

Vector Boson Fusion ◽

Doublet Model ◽

Inert Doublet Model ◽

Two Higgs Doublet Model

AbstractIn this work, we use a recast of the Run II search for invisible Higgs decays within Vector Boson Fusion to constrain the parameter space of the Inert Doublet model, a two Higgs doublet model with a dark matter candidate. When including all known theoretical as well as collider constraints, we find that the above can rule out a relatively large part in the $$m_H,\,\lambda _{345}$$mH,λ345 parameter space, for dark scalar masses $$m_H\,\le \,100\,{\mathrm{GeV}}$$mH≤100GeV. Including the latest dark matter constraints, a smaller part of parameter space remains which is solely excluded from the above analysis. We also discuss the sensitivity of monojet searches and multilepton final states from Run II.

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Electroweak corrections in a pseudo Nambu-Goldstone Dark Matter model revisited

Journal of High Energy Physics ◽

10.1007/jhep12(2020)034 ◽

2020 ◽

Vol 2020 (12) ◽

Author(s):

Seraina Glaus ◽

Margarete Mühlleitner ◽

Jonas Müller ◽

Shruti Patel ◽

Tizian Römer ◽

...

Keyword(s):

Dark Matter ◽

Cross Section ◽

Parameter Space ◽

Goldstone Boson ◽

Indirect Evidence ◽

Tree Level ◽

Dark Matter Candidate ◽

Nucleon Scattering ◽

The Cross ◽

Electroweak Corrections

Abstract Having so far only indirect evidence for the existence of Dark Matter a plethora of experiments aims at direct detection of Dark Matter through the scattering of Dark Matter particles off atomic nuclei. For the correct interpretation and identification of the underlying nature of the Dark Matter constituents higher-order corrections to the cross section of Dark Matter-nucleon scattering are important, in particular in models where the tree-level cross section is negligibly small. In this work we revisit the electroweak corrections to the dark matter-nucleon scattering cross section in a model with a pseudo Nambu-Goldstone boson as the Dark Matter candidate. Two calculations that already exist in the literature, apply different approaches resulting in different final results for the cross section in some regions of the parameter space leading us to redo the calculation and analyse the two approaches to clarify the situation. We furthermore update the experimental constraints and examine the regions of the parameter space where the cross section is above the neutrino floor but which can only be probed in the far future.

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