Extraction of the Top Quark Mass and the Strong Coupling Constant

2021 ◽  
pp. 93-102
Author(s):  
Matteo M. Defranchis
Keyword(s):  
Strong Coupling ◽  
Top Quark ◽  
Quark Mass ◽  
Strong Coupling Constant ◽  
Coupling Constant ◽  
Top Quark Mass

scholarly journals Dark matter detection, Standard Model parameters and Intermediate Scale Supersymmetry

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
David Dunsky ◽  
Lawrence J. Hall ◽  
Keisuke Harigaya
Keyword(s):  
Dark Matter ◽  
Strong Coupling ◽  
Top Quark ◽  
Quark Mass ◽  
Strong Coupling Constant ◽  
Model Parameters ◽  
Coupling Constant ◽  
Top Quark Mass ◽  
Intermediate Scale ◽  
Dark Matter Mass

Abstract The vanishing of the Higgs quartic coupling at a high energy scale may be explained by Intermediate Scale Supersymmetry, where supersymmetry breaks at (109-1012) GeV. The possible range of supersymmetry breaking scales can be narrowed down by precise measurements of the top quark mass and the strong coupling constant. On the other hand, nuclear recoil experiments can probe Higgsino or sneutrino dark matter up to a mass of 1012 GeV. We derive the correlation between the dark matter mass and precision measurements of standard model parameters, including supersymmetric threshold corrections. The dark matter mass is bounded from above as a function of the top quark mass and the strong coupling constant. The top quark mass and the strong coupling constant are bounded from above and below respectively for a given dark matter mass. We also discuss how the observed dark matter abundance can be explained by freeze-out or freeze-in during a matter-dominated era after inflation, with the inflaton condensate being dissipated by thermal effects.

STABILITY OF THE TOP QUARK MASS IN SUPERSYMMETRIC TOP CONDENSATE MODELS

1991 ◽  
Vol 06 (35) ◽  
pp. 3225-3237 ◽  
Author(s):  
T. E. CLARK ◽  
S. T. LOVE ◽  
W. T. A. TER VELDHUIS
Keyword(s):  
Fixed Point ◽  
Renormalization Group ◽  
Yukawa Coupling ◽  
Top Quark ◽  
Quark Mass ◽  
Coupling Constant ◽  
Top Quark Mass ◽  
Higher Dimensional

The top quark mass prediction in supersymmetric top condensate models is found to be insensitive to the inclusion of the effects of higher dimensional operators. For associated coefficients of characteristically moderate strength, the supersymmetric renormalization group trajectories are strongly focused to the infrared quasi-fixed point of the top Yukawa coupling constant.

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