scholarly journals Gauge-mediation model of dynamical SUSY breaking with a wide range of the gravitino mass

1999 ◽  
Vol 452 (3-4) ◽  
pp. 274-278 ◽  
Author(s):  
K.-I. Izawa ◽  
Yasunori Nomura ◽  
T. Yanagida
Keyword(s):  
Susy Breaking ◽  
Gauge Mediation ◽  
Mediation Model ◽  
Gravitino Mass ◽  
Wide Range

scholarly journals Charms of strongly interacting conformal gauge mediation

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Gong jun Choi ◽  
Tsutomu T. Yanagida ◽  
Norimi Yokozaki
Keyword(s):  
Production Cross ◽  
Mass Scale ◽  
Susy Breaking ◽  
Fine Tuning ◽  
Gauge Mediation ◽  
Gravitino Mass ◽  
Strongly Interacting ◽  
Conformal Gauge ◽  
Single Mass ◽  
Breaking Scale

Abstract By extending a previously proposed conformal gauge mediation model, we construct a gauge-mediated SUSY breaking (GMSB) model where a SUSY-breaking scale, a messenger mass, the μ-parameter and the gravitino mass in a minimal supersymmetric (SUSY) Standard Model (MSSM) are all explained by a single mass scale, a R-symmetry breaking scale. We focus on a low scale SUSY-breaking scenario with the gravitino mass m3/2 = $$ \mathcal{O}(1)\mathrm{eV} $$ O 1 eV , which is free from the cosmological gravitino problem and relaxes the fine-tuning of the cosmological constant. Both the messenger and SUSY-breaking sectors are subject to a hidden strong dynamics with the conformality above the messenger mass threshold (and hence the name of the model “strongly interacting conformal gauge mediation”). In our model, the Higgs B-term is suppressed and a large tan β is predicted, resulting in the relatively light second CP-even Higgs and the CP-odd Higgs with a sizable production cross section. These Higgs bosons can be tested at future LHC experiments.

scholarly journals The upper bound of the second Higgs boson mass in minimal gauge mediation with the gravitino warm dark matter

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Gong jun Choi ◽  
Tsutomu T. Yanagida ◽  
Norimi Yokozaki
Keyword(s):  
Dark Matter ◽  
Higgs Boson ◽  
Upper Bound ◽  
Hadron Collider ◽  
Susy Breaking ◽  
Boson Mass ◽  
Small Scale ◽  
Gauge Mediation ◽  
Gravitino Mass ◽  
The Masses

Abstract A keV-scale gravitino arising from a minimal supersymmetric (SUSY) Standard Model (MSSM) is an interesting possibility since the small scale problems that the ΛCDM model encounters in the modern cosmology could be alleviated with the keV-scale gravitino serving as the warm dark matter (WDM). Such a light gravitino asks for a low scale supersymmetry (SUSY) breaking for which the gauge mediation (GM) is required as a consistent SUSY-breaking mediation mechanism. In this paper, we show upper bounds of the masses of the second CP-even Higgs boson H and the CP-odd Higgs boson A, assuming the keV-scale gravitino to be responsible for the current DM relic abundance: the upper bound on the mass of H/A is found to be ∼ 4 TeV for the gravitino mass of $$ \mathcal{O}\left(10-100\right) $$ O 10 − 100 keV. Interestingly, the mass of H/A can be as small as 2–3 TeV and the predicted tan β is as large as 55–60 for the gravitino mass of $$ \mathcal{O}(10) $$ O 10 keV. This will be tested in the near future Large Hadron Collider (LHC) experiments.

scholarly journals A gauge-mediation model with a light gravitino of mass O(10) eV and the messenger dark matter

2005 ◽  
Vol 615 (1-2) ◽  
pp. 120-126 ◽  
Author(s):  
Masahiro Ibe ◽  
Kazuhiro Tobe ◽  
Tsutomu Yanagida
Keyword(s):  
Dark Matter ◽  
Gauge Mediation ◽  
Mediation Model

scholarly journals SOFT LEPTOGENESIS AND GRAVITINO DARK MATTER IN GAUGE MEDIATION

2011 ◽  
Vol 20 (08) ◽  
pp. 1533-1538
Author(s):  
KOICHI HAMAGUCHI ◽  
N. YOKOZAKI
Keyword(s):  
Dark Matter ◽  
Baryon Asymmetry ◽  
Susy Breaking ◽  
Gauge Mediation ◽  
Susy Particle ◽  
The Universe

In gauge mediated SUSY breaking models, the gravitino is generally the lightest SUSY particle and can be a candidate for a dark matter. However the viable abundance of the gravitino requires rather low reheating temparature. With this low reheating temparature, it is difficult to explain the baryon asymmetry of the universe with thermal leptogenesis. We consider the extended scenario of the gauge mediation, which generates A-terms. In this extended scenario, soft leptogenesis works successfully with the low reheating temperature. Therefore we can explain the baryon asymmetry and gravitino dark matter simultaneously.

scholarly journals GAUGE MEDIATION OF SUPERSYMMETRY BREAKING AND THE FROGGATT–NIELSEN MECHANISM

2011 ◽  
Vol 26 (15) ◽  
pp. 1117-1124
Author(s):  
ZHONG-HUA ZHANG ◽  
DA-XIN ZHANG
Keyword(s):  
Supersymmetry Breaking ◽  
Susy Breaking ◽  
Tree Level ◽  
Supersymmetric Model ◽  
Gauge Mediation

In the model of gauge mediation of SUSY breaking in the presence of tree-level mediation, the Froggatt–Nielsen mechanism provides a different hierarchy of sparticle masses. We study the spectra and show the results to be like those in an effective supersymmetric model.

scholarly journals Gauge mediation with D-term SUSY breaking

2007 ◽  
Vol 655 (1-2) ◽  
pp. 58-66 ◽  
Author(s):  
Y. Nakayama ◽  
Masato Taki ◽  
Taizan Watari ◽  
T.T. Yanagida
Keyword(s):  
Susy Breaking ◽  
Gauge Mediation
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