Lepton-flavor violating signatures in supersymmetric U(1)′ seesaw

2015 ◽  
Vol 30 (15) ◽  
pp. 1530041 ◽  
Author(s):  
Eung Jin Chun
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Lepton Number ◽  
Dark Matter Candidate ◽  
Third Generation ◽  
Lepton Flavor ◽  
The Third ◽  
Relic Density ◽  
The Right ◽  
Generation Squarks

In a supersymmetric U(1)′ seesaw model, a right-handed sneutrino can be a good thermal dark matter candidate if the extra gaugino [Formula: see text] is light enough to provide an appropriate annihilation cross-section through a t-channel diagram. We first discuss how right thermal relic density of the right-handed sneutrino dark matter can arise and then explore lepton number and flavor violating signatures followed by cascade production of [Formula: see text] from the third generation squarks at the LHC.

scholarly journals DARK MATTER CANDIDATE FROM CONFORMALITY

2007 ◽  
Vol 22 (13) ◽  
pp. 931-937 ◽  
Author(s):  
P. H. FRAMPTON
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Cross Section ◽  
Weak Interaction ◽  
Gauge Theories ◽  
Dark Matter Candidate ◽  
Beyond The Standard Model ◽  
The Standard Model ◽  
Relic Density ◽  
Baryonic Dark Matter

Abelian quiver gauge theories provide candidates for the conformality approach to physics beyond the standard model which possess novel cancellation mechanisms for quadratic divergences. A Z2 symmetry ( R parity) can be imposed and leads naturally to a dark matter candidate which is the Lightest Conformality Particle (LCP), a neutral spin-1 / 2 state with weak interaction annihilation cross-section, mass in the 100 GeV region and relic density of non-baryonic dark matter Ωdm which can be consistent with the observed value Ωdm≃0.24.

scholarly journals Dark matter and baryogenesis from non-Abelian gauged lepton number

2017 ◽  
Vol 32 (19) ◽  
pp. 1730018 ◽  
Author(s):  
Bartosz Fornal
Keyword(s):  
Dark Matter ◽  
Gauge Symmetry ◽  
Simple Model ◽  
Standard Model ◽  
Gauge Group ◽  
Lepton Number ◽  
Dark Matter Candidate ◽  
The Standard Model ◽  
The Right ◽  
Standard Model Gauge Group

A simple model is constructed based on the gauge symmetry [Formula: see text], with only the leptons transforming nontrivially under [Formula: see text]. The extended symmetry is broken down to the Standard Model gauge group at TeV-scale energies. We show that this model provides a mechanism for baryogenesis via leptogenesis in which the lepton number asymmetry is generated by [Formula: see text] instantons. The theory also contains a dark matter candidate — the [Formula: see text] partner of the right-handed neutrino.

scholarly journals Dark matter, fine-tuning and (g-2)_{\mu} in the pMSSM

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Melissa van Beekveld ◽  
Wim Beenakker ◽  
Marrit Schutten ◽  
Jeremy De Wit
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Cross Section ◽  
Direct Detection ◽  
Fine Tuning ◽  
Dark Matter Relic Density ◽  
Depth Analysis ◽  
Relic Density ◽  
The Right ◽  
First Time

In this paper we perform for the first time an in-depth analysis of the spectra in the phenomenological supersymmetric Standard Model that simultaneously offer an explanation for the (g-2)_{\mu}(g−2)μ discrepancy \Delta a_{\mu}Δaμ, result in the right dark-matter relic density \Omega_{DM} h^2ΩDMh2 and are minimally fine-tuned. The resulting spectra may be obtained from [1]. To discuss the experimental exclusion potential for our models, we analyse the resulting LHC phenomenology as well as the sensitivity of dark-matter direct detection experiments to these spectra. We find that the latter type of experiments with sensitivity to the spin-dependent dark-matter–nucleon scattering cross section \sigma_{SD,p}σSD,p will probe all of our found solutions.

scholarly journals IDM Benchmarks for the LHC and Future Colliders

Symmetry ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 991
Author(s):  
Jan Kalinowski ◽  
Tania Robens ◽  
Dorota Sokołowska ◽  
Aleksander Filip Żarnecki
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Cross Sections ◽  
Higgs Doublet ◽  
Low Energy ◽  
Dark Matter Candidate ◽  
Relic Density ◽  
Doublet Model ◽  
Inert Doublet Model ◽  
Two Higgs Doublet Model

We present cross-section expectations for various processes and collider options, for benchmark scenarios of the Inert Doublet Model, a Two Higgs Doublet Model with a dark matter candidate. The proposed scenarios are consistent with current dark matter constraints, including the most recent bounds from the XENON1T experiment and relic density, as well as with known collider and low-energy limits. These benchmarks, chosen in earlier work for studies at e+e− colliders, exhibit a variety of kinematic features that should be explored at current and future runs of the LHC. We provide cross sections for all relevant production processes at 13 TeV, 27 TeV and 100 TeV proton collider, as well as for a possible 10 TeV and 30 TeV muon collider.

scholarly journals Dark Matter EFT, the Third -- Neutrino WIMPs

2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Ingolf Bischer ◽  
Tilman Plehn ◽  
Werner Rodejohann
Keyword(s):  
Dark Matter ◽  
Indirect Detection ◽  
Third Generation ◽  
Sterile Neutrinos ◽  
The Third ◽  
Relic Density ◽  
Generation Scalar ◽  
Direct And Indirect Detection

Sterile neutrinos coupling only to third-generation fermions are attractive dark matter candidates. In an EFT approach we demonstrate that they can generate the observed relic density without violating constraints from direct and indirect detection. Such an EFT represents a gauged third-generation B-L model, as well as third-generation scalar or vector leptoquarks. LHC measurements naturally distinguish the different underlying models.

scholarly journals Hybrid anomaly and gravity mediation for electroweak supersymmetry

2018 ◽  
Vol 33 (07) ◽  
pp. 1850035
Author(s):  
Bin Zhu ◽  
Ran Ding ◽  
Tianjun Li
Keyword(s):  
Dark Matter ◽  
Supersymmetry Breaking ◽  
Cross Section ◽  
Direct Detection ◽  
Dark Matter Candidate ◽  
Gauge Mediation ◽  
Anomaly Mediation ◽  
Dark Matter Relic Density ◽  
Relic Density ◽  
Hybrid Anomaly

In this paper, we propose a hybrid mediation and hybrid supersymmetry breaking. In particular, the RG-invariant anomaly mediation is considered. Together with additional gravity mediation, the slepton tachyon problem of anomaly mediation is solved automatically. The special properties are that all color sparticles masses fall into several TeV regions due to the large [Formula: see text] and [Formula: see text] which are well beyond the scope of current LHC Run II limits. Unlike the gauge mediation, the dark matter candidate is still the lightest neutralino and the correct dark matter relic density can be realized within the framework of mixed axion-Wino dark matter. Due to the existence of multi-component axion-Wino dark matter, the direct detection cross-section is suppressed to evade the tightest LUX, PandaX bound.

scholarly journals Dark matter freeze-in from semi-production

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Andrzej Hryczuk ◽  
Maxim Laletin
Keyword(s):  
Dark Matter ◽  
Early Universe ◽  
Cross Section ◽  
Thermal Equilibrium ◽  
Indirect Detection ◽  
Production Mechanism ◽  
Number Density ◽  
Matter Production ◽  
Relic Density ◽  
Standard Formalism

Abstract We study a novel dark matter production mechanism based on the freeze-in through semi-production, i.e. the inverse semi-annihilation processes. A peculiar feature of this scenario is that the production rate is suppressed by a small initial abundance of dark matter and consequently creating the observed abundance requires much larger coupling values than for the usual freeze-in. We provide a concrete example model exhibiting such production mechanism and study it in detail, extending the standard formalism to include the evolution of dark matter temperature alongside its number density and discuss the importance of this improved treatment. Finally, we confront the relic density constraint with the limits and prospects for the dark matter indirect detection searches. We show that, even if it was never in full thermal equilibrium in the early Universe, dark matter could, nevertheless, have strong enough present-day annihilation cross section to lead to observable signals.

scholarly journals INFLUENCE OF THE RIGHT TO THE ENVIRONMENT ON SUSTAINABLE DEVELOPMENT FROM THE PERSPECTIVE OF INTERNATIONAL LAW

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Akramosadat Kia
Keyword(s):  
Sustainable Development ◽  
Human Rights ◽  
International Law ◽  
Environmental Law ◽  
Human Life ◽  
Legal Protection ◽  
Third Generation ◽  
Human Beings ◽  
The Third ◽  
The Right

Nature is one of the most important pillars of human life, which is why the environment has been considered in all historical periods. At first, contemporary international law seeks to protect the environment as part of international environmental law, but the inadequacy of this protection and the need to protect the environment for Nowadays's human beings and future generations, the link between the environment and human rights It was considered because legal protection of human rights could be a means to protect the environment. Hence, in the context of the third generation of human rights, a new right called "the right to the environment" was created in international human rights instruments, in which the environment was raised as a human right. This right is not only a reminder of the solidarity rights that are categorized in the third generation of human rights, but also necessary for the realization of many human rights, civil, political or economic, social and cultural rights. However, the exercise of this right requires a level of development which in turn provides for a greater degree of environmental degradation. Hence, the international community since the nineties has promoted the idea of sustainable development at all levels of national, regional and the international has put it on its agenda.

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

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.

scholarly journals Deformed compact extra space as dark matter candidate

2015 ◽  
Vol 24 (13) ◽  
Author(s):  
Vakhid A. Gani ◽  
Alexander E. Dmitriev ◽  
Sergey G. Rubin
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Spatial Domain ◽  
Dark Matter Candidate ◽  
Observational Constraints ◽  
Two Dimensional ◽  
Ordinary Matter ◽  
Multidimensional Gravity ◽  
Extra Space ◽  
Defect Estimation

We elaborate the possibility for a deformed extra space to be considered as the dark matter candidate. To perform calculations, a class of two-dimensional extra metrics was considered in the framework of the multidimensional gravity. It was shown that there exists a family of stationary metrics of the extra space possessing point-like defect. Estimation of cross-section of scattering of a particle of the ordinary matter on a spatial domain with deformed extra space is in agreement with the observational constraints.

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