scholarly journals Fine tuning in general gauge mediation

2010 ◽  
Vol 2010 (1) ◽  
Author(s):  
Tatsuo Kobayashi ◽  
Yuichiro Nakai ◽  
Ryo Takahashi
Keyword(s):  
Fine Tuning ◽  
Gauge Mediation ◽  
General Gauge

scholarly journals Low fine-tuning in Yukawa-deflected gauge mediation

2017 ◽  
Vol 95 (9) ◽  
Author(s):  
Waqas Ahmed ◽  
Lorenzo Calibbi ◽  
Tianjun Li ◽  
Azar Mustafayev ◽  
Shabbar Raza
Keyword(s):  
Fine Tuning ◽  
Gauge Mediation

WHY IS THE HIDDEN SECTOR INVISIBLE?

2000 ◽  
Vol 15 (35) ◽  
pp. 2131-2137 ◽  
Author(s):  
M. D. POLLOCK
Keyword(s):  
Degrees Of Freedom ◽  
Coupling Parameter ◽  
Vacuum State ◽  
Fine Tuning ◽  
Gauge Mediation ◽  
Superstring Theory ◽  
Thermodynamical Equilibrium ◽  
Hidden Sector ◽  
Axion Field ◽  
Model Independent

The hidden sector of the E8×E′8 heterotic superstring theory of Gross et al. can in principle contain additional "shadow" matter, interacting only gravitationally with the real world in which we live. The SU (3)′ C × SU (2)′ L × U (1)′ Y shadow configuration symmetric to the standard model has been ruled out by Kolb et al. from nucleosynthesis arguments, combined with the existence of three light neutrinos. In the absence of inflation and of entropy enhancement by the out-of-equilibrium decay of an unstable particle, the same exclusion applies to the unbroken E′8 hidden gauge group, assuming thermodynamical equilibrium with the observable sector E6 group, and consequently all breaking chains E′8→ G1×G2×⋯, since they can only reduce the effective number of four-dimensional degrees of freedom g eff . The hidden sector would then appear to be in its vacuum state, which implies the absence of all condensates as well, if their potentials are positive semi-definite. In this case, and if there is no anomalous U(1) symmetry in the observable sector, the QCD axion is the model-independent axion, whose decay constant [Formula: see text] (where [Formula: see text] is the strong-interaction coupling parameter) requires a fine-tuning of the initial value of this axion field to ai/fa≲3×10-3, in order not to overclose the Universe today, supersymmetry being broken by gauge mediation. Vice versa, if ai/fa~1, then hidden-sector gaugino condensation is necessary for there to be a sufficiently massive gravitino, whose decay can increase the entropy. Astronomical microlensing observations may help to discriminate between these two cases.

scholarly journals General Gauge Mediation

2009 ◽  
Vol 177 ◽  
pp. 143-158 ◽  
Author(s):  
Patrick Meade ◽  
Nathan Seiberg ◽  
David Shih
Keyword(s):  
Gauge Mediation ◽  
General Gauge

scholarly journals Focus point gauge mediation without a severe fine-tuning

2018 ◽  
Vol 2018 (10) ◽  
Author(s):  
Tsutomu T. Yanagida ◽  
Norimi Yokozaki
Keyword(s):  
Fine Tuning ◽  
Gauge Mediation ◽  
Focus Point

scholarly journals Phenomenology of pure general gauge mediation

2009 ◽  
Vol 2009 (12) ◽  
pp. 001-001 ◽  
Author(s):  
Steven Abel ◽  
Matthew J Dolan ◽  
Joerg Jaeckel ◽  
Valentin V Khoze
Keyword(s):  
Gauge Mediation ◽  
General Gauge

scholarly journals Probing the electroweakino sector of general gauge mediation at the LHC

2018 ◽  
Vol 783 ◽  
pp. 150-157 ◽  
Author(s):  
Jong Soo Kim ◽  
Manuel E. Krauss ◽  
Víctor Martín Lozano
Keyword(s):  
Gauge Mediation ◽  
General Gauge

scholarly journals Holographic correlators for general gauge mediation

2012 ◽  
Vol 2012 (8) ◽  
Author(s):  
Riccardo Argurio ◽  
Matteo Bertolini ◽  
Lorenzo Di Pietro ◽  
Flavio Porri ◽  
Diego Redigolo
Keyword(s):  
Gauge Mediation ◽  
General Gauge

scholarly journals Dirac gauginos in general gauge mediation

2009 ◽  
Vol 816 (1-2) ◽  
pp. 185-203 ◽  
Author(s):  
K. Benakli ◽  
M.D. Goodsell
Keyword(s):  
Gauge Mediation ◽  
General Gauge

scholarly journals FROM SUPERCURRENTS TO SOFT TERMS

2011 ◽  
Vol 26 (31) ◽  
pp. 2345-2356
Author(s):  
SIBO ZHENG ◽  
JIA-HUI HUANG
Keyword(s):  
Wave Function ◽  
Simple Form ◽  
Sum Rules ◽  
Gauge Mediation ◽  
General Gauge ◽  
Gaugino Masses

In this paper conformal hidden sectors of Ferrara–Zumino multiplets are investigated in framework of gravity mediation. The two-point correlator of Ferrara–Zumino multiplets can be parametrized, which implies the wave function renormalizations of components fields in gravity supermultiplet can be evaluated in relatively simple form. Soft terms are calculated via supercurrent approach. We find gaugino masses are independent of sfermion masses on general grounds. The unification of gaugino masses is not universal. In comparison with general gauge mediation, there are no sum rules for sfermion masses of each generation.

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