Open AccessNew dark matter candidates motivated from superstring derived unification
Author(s) -
Sanghyeon Chang,
Claudio Corianò,
Alon E. Faraggi
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/228223
Subject(s) - superstring theory , physics , particle physics , quark , green–schwarz mechanism , grand unified theory , gauge symmetry , string (physics) , standard model (mathematical formulation) , supersymmetry , minimal supersymmetric standard model , unification , gauge (firearms) , theoretical physics , gauge theory , quantum mechanics , archaeology , quantum gravity , relationship between string theory and quantum field theory , quantum , history , computer science , programming language
Perturbative gauge coupling unification in realistic superstring models suggest the existence of additional heavy down-type quarks, beyond the minimal supersymmetric standard model. The mass scale of the heavy down-type quarks is constrained by requiring agreement between the measured low energy gauge parameters and the string-scale gauge coupling unification. These additional quarks arise and may be stable due to the gauge symmetry breaking by ``Wilson lines`` in the superstring models. We argue that there is a window in the parameter space within which this down-type quark is a good candidate for the dark matter. 18 refs