Study of dark matter physics in non-universal gaugino mass scenario

Self Cite

Abstract:We discuss effective models derived from a supersymmetric model whose mediation mechanism of supersymmetry (SUSY) breaking is namely mirage mediation. In this model, light higgsino mass, that is required by the natural realization of the electroweak scale, is achieved by the unification of the soft SUSY breaking parameters at the low scale. Besides, we find that extra Higgs fields are also possibly light in some cases. Then, the effective model is a two Higgs doublet model (2HDM) with higgsinos, and it is distinguishable with namely type-II 2HDM which is widely discussed. In this paper, we study the mass spectrum of SUSY particles and the extra Higgs fields, and summarize the phenomenology in the effective model. We survey the current experimental bounds from the LHC and the dark matter experiments as well as the flavor physics. Then, we point out the expected mass scale of the SUSY particles and reveal the future prospects for the direct and indirect searches. We also discuss the difference between our effective model and the 2HDM in the bottom-up approach.

Section: Jhep11(2017)189mentioning

confidence: 97%

“…[91], where the phenomenology of the higgsino DM is studied in the Non-Universal Gaugino Mass scenario. The most important difference with the previous work in ref.…”

Section: Jhep11(2017)189mentioning

confidence: 99%

Section: Jhep11(2017)189mentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the TeV-scale mirage mediation with heavy superparticles

Kawamura¹,

Omura²

2017

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“…With assuming µ eff ∼ 1 TeV, the flavon VEV v s is expected to be O (100 TeV). The direct detection rate will be suppressed as far as the EW gauginos are much heavier than the Higgsino masses [90]. This type of mass spectra, where Higgsinos are much lighter than other sparticles, is the so-called natural SUSY.…”

Section: Neutralino Mass and Dark Matter Physicsmentioning

confidence: 99%

A low-scale flavon model with a ℤN symmetry

Higaki

Kawamura

2020

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We propose a model that explains the fermion mass hierarchy by the Froggatt-Nielsen mechanism with a discrete Z F N symmetry. As a concrete model, we study a supersymmetric model with a single flavon coupled to the minimal supersymmetric Standard Model. Flavon develops a TeV scale vacuum expectation value for realizing flavor hierarchy, an appropriate µ-term and the electroweak scale, hence the model has a low cutoff scale. We demonstrate how the flavon is successfully stabilized together with the Higgs bosons in the model. The discrete flavor symmetry Z F N controls not only the Standard Model fermion masses, but also the Higgs potential and a mass of the Higgsino which is a good candidate for dark matter. The hierarchy in the Higgs-flavon sector is determined in order to make the model anomaly-free and realize a stable electroweak vacuum. We show that this model can explain the fermion mass hierarchy, realistic Higgs-flavon potential and thermally produced dark matter at the same time. We discuss flavor violating processes induced by the light flavon which would be detected in future experiments. N sym-1 Recently, it is proposed that a flavon can be identified as the QCD axion [3-8] 2 See, e.g., Refs. [35,36] for recent models with a flavor modular symmetry and also for such interactions in string models.3 Models with a combination of Higgs doublets H u H d as a flavon are studied in Refs. [41][42][43].

“…A non-universal gaugino mass spectrum can be realized in theoretically well-motivated frameworks such as the mirage mediation [38][39][40][41][42][43][44], nonminimal GUT models [45][46][47][48][49][50][51][52][53], models with a non-universal gauge kinetic function via string compactifications [54,55], and so on, and found to be advantageous for the electroweak naturalness problem [56,57]. These observations have stimulated many studies on non-universal gaugino masses so far [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75]. In particular, discussions on mirage mediation in the NMSSM can be found in Refs.…”

Section: Introductionmentioning

confidence: 99%

Non-universal gaugino masses in the NMSSM

Kawamura

Kobayashi

2018

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The Next-to-Minimal Supersymmetric Standard Model (NMSSM) provides a natural framework to realize a low-scale supersymmetric (SUSY) model, where a singlet superfield is added to the minimal model to generate a SUSY-scale higgsino mass term with its vacuum expectation value. Due to the presence of the extra singlet field, the vacuum conditions to realize the correct electroweak symmetrybreaking become fairly restrictive especially if we impose universality conditions at the unification scale. In this paper, we show that a non-universal gaugino mass spectrum can significantly relax this restriction even though the scalar masses and trilinear couplings are subject to universality conditions. With the gaugino nonuniversality, we find that higgsino can be the lightest SUSY particle and its thermal relic abundance can reproduce the observed dark matter density in a wide range of parameter space in which the 125 GeV Higgs-boson mass is obtained. This higgsinolike dark matter may be probed in direct detection experiments. We also find that there is an upper bound on the masses of supersymmetric particles in this scenario, and many model points predict colored particles such as gluino to be within the reach of a future 100 TeV collider. Implications for no-scale/gaugino-mediation models are also discussed. *