New dark matter candidates motivated from superstring derived unification
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.
- Research Organization:
- Florida Univ., Gainesville, FL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Korea Science and Engineering Foundation (Korea, Republic of)
- DOE Contract Number:
- FG05-86ER40272
- OSTI ID:
- 228223
- Report Number(s):
- DOE/ER/40272--250; UFIFT-HEP--96-9; HEP-PH--9603272; ON: DE96010585
- Country of Publication:
- United States
- Language:
- English
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