scholarly journals Lower limit on the gravitino mass in low-scale gauge mediation with m H ≃ 125 GeV

2017 ◽  
Vol 764 ◽  
pp. 260-264 ◽  
Author(s):  
Masahiro Ibe ◽  
Tsutomu T. Yanagida
Keyword(s):  
Lower Limit ◽  
Gauge Mediation ◽  
Gravitino Mass

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 Bounds on scalar masses in theories of moduli stabilization

2014 ◽  
Vol 29 (11n12) ◽  
pp. 1450073 ◽  
Author(s):  
Bobby Samir Acharya ◽  
Gordon Kane ◽  
Eric Kuflik
Keyword(s):  
Dark Matter ◽  
String Theory ◽  
Direct Detection ◽  
Fine Tuning ◽  
Gauge Mediation ◽  
Moduli Stabilization ◽  
Gravitino Mass ◽  
Matter Production ◽  
History Of ◽  
The Universe

In recent years it has been realized that pre-BBN decays of moduli can be a significant source of dark matter production, giving a "nonthermal WIMP miracle" and substantially reduced fine-tuning in cosmological axion physics. We study moduli masses and sharpen the claim that moduli dominated the pre-BBN universe. We conjecture that in any string theory with stabilized moduli there will be at least one modulus field whose mass is of order (or less than) the gravitino mass. Cosmology then generically requires the gravitino mass not be less than about 30 TeV and the cosmological history of the universe is nonthermal prior to BBN. Stable LSP's produced in these decays can account for the observed dark matter if they are "wino-like." We briefly consider implications for the LHC, rare decays, and dark matter direct detection and point out that these results could prove challenging for models attempting to realize gauge mediation in string theory.

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.

Supernovae and interstellar gas dynamics

1967 ◽  
Vol 31 ◽  
pp. 117-119
Author(s):  
F. D. Kahn ◽  
L. Woltjer
Keyword(s):  
Lower Limit ◽  
High Velocity ◽  
Gas Dynamics ◽  
Interstellar Cloud ◽  
Interstellar Gas ◽  
Random Motions ◽  
Relativistic Particles

The efficiency of the transfer of energy from supernovae into interstellar cloud motions is investigated. A lower limit of about 0·002 is obtained, but values near 0·01 are more likely. Taking all uncertainties in the theory and observations into account, the energy per supernova, in the form of relativistic particles or high-velocity matter, needed to maintain the random motions in the interstellar gas is estimated as 1051·4±1ergs.

Factor XII Determinations in the Presence and Absence of Phospholipid Antibodies

1998 ◽  
Vol 79 (01) ◽  
pp. 87-90 ◽  
Author(s):  
D. W. Jones ◽  
M. Winter ◽  
M. J. Gallimore
Keyword(s):  
Lower Limit ◽  
Lupus Anticoagulant ◽  
Factor Xii ◽  
Chromogenic Substrate ◽  
Plasma Samples ◽  
Presence And Absence ◽  
Lower Limit Of Normal

SummaryFactor XII (FXII) levels were determined in plasma samples from 29 normal donors, 10 patients with inherited FXII deficiency (all lupus anticoagulant [LA] negative) and 67 LA positive patients, using clotting (FXIIct), chromogenic substrate (FXIIcs) and immunochemical (FXIIag) assays. Excellent correlations were obtained in the three FXII assays with the LA negative samples and between the FXIIcs and FXIIag assays in the LA positive samples. Correlations between both the FXIIcs and FXIIag with FXIIct in the LA positive patients were poor. Of 67 LA positive samples studied, 25 (37.3%) showed lower values in the FXIIct assay; 13 (19.4%) of these patients were pseudo FXII deficient with values of FXII below the lower limit of normal.These results indicate that a diagnosis of FXII deficiency can be made inappropriately in the presence of phospholipid antibodies and that such a diagnosis should not be made by FXIIct assay alone.

Effects of Age and Health on the Euthyroid Reference Ranges for Serum Free Thyroxine and Free Triiodothyronine

1985 ◽  
Vol 24 (02) ◽  
pp. 57-65 ◽  
Author(s):  
J. E. M. Midgley ◽  
K. R. Gruner
Keyword(s):  
Lower Limit ◽  
Healthy Subjects ◽  
Thyroid Dysfunction ◽  
Reference Range ◽  
Free Thyroxine ◽  
Reference Ranges ◽  
Free Triiodothyronine ◽  
Serum Free ◽  
Young Subjects ◽  
Age Range

SummaryAge-related trends in serum free thyroxine (FT4) and free triiodothyronine (FT3) concentrations were measured in 7248 euthyroid subjects (age-range 3 months to 106 years). 5700 were patients referred to hospitals for investigation of suspected thyroid dysfunction, but who were diagnosed euthyroid. 1548 were healthy blood donors (age-range 18-63 years) with no indication of thyroid dysfunction. FT4 concentrations were little affected by the age, the sex or the state of health of the subjects in either group. Serum FT3 concentrations were significantly affected by both age and health factors. The upper limit of the euthyroid reference range for young subjects up to 15 years was about 20% higher (10.4 pmol/1) than for adult subjects older than 25 years (8.8 pmol/1). The change in the upper limits typical of young subjects to that typical of adults occurred steadily over the decade 15–25 years. After this age, little further change occurred, especially in healthy subjects. Additionally, the lower limit of the euthyroid range for FT3 was extended by the inclusion in the reference group of patients referred to hospitals. Compared with the lower limit of the FT3 range for healthy subjects (5 pmol/1), the corresponding limit for referred subjects (young or adult) was 3.5–3.8 pmol/1. Broadening of the FT3 reference range was probably brought about by a significant number of patients in the hospital-referred group with the “1OW-T3 syndrome” of mild non-thyroidal illness. Accordingly, FT3 was inferior to FT4 in the discrimination of hypothyroidism, as FT4 was unaffected by this phenomenon. Effects of age and non-thyroidal illness on serum FT3 concentrations require great care when selecting subjects for a laboratory euthyroid reference range typical of the routine workload. Constraints on the choice of subjects for FT4 reference ranges are less stringent.

Lower Limit of the Possible Nucleate Pool-Boiling Enhancement by Surfactant Addition to Water

2002 ◽  
Vol 9 (3-4) ◽  
pp. 153-160 ◽  
Author(s):  
Yu-Min Yang ◽  
Chao-Yang Lin ◽  
Ming-Huei Liu ◽  
Jer-Ru Maa
Keyword(s):  
Lower Limit ◽  
Pool Boiling ◽  
Nucleate Pool Boiling ◽  
Boiling Enhancement
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